IN: "Free as a Bird" is a song originally composed and recorded in 1977 as a home demo by John Lennon. In 1995, a studio version of the recording, incorporating contributions from Paul McCartney, George Harrison and Ringo Starr, was released as a single by the Beatles. It was released 25 years after the break-up of the band and 15 years after the death of Lennon. The single was released as part of the promotion for The Beatles Anthology video documentary and the band's Anthology 1 compilation album.

McCartney, Harrison and Starr originally intended to record some incidental background music, as a trio, for the Anthology project, but later realised, according to Starr, that they wanted to record "new music". According to Harrison, they had always agreed that if one of them was not in the band, the others would never replace them and, "... go out as the Beatles", and that the "only other person that could be in it was John."  McCartney then asked Ono if she had any unreleased recordings by Lennon, so she sent him cassette tapes of four songs. "Free as a Bird" was recorded by Lennon in 1977, in his and Ono's Dakota building apartment in New York City, but was not complete. Lennon introduced the song on the cassette by imitating a New York accent and saying, "Free--as a boid" (bird). The other songs were "Grow Old With Me", "Real Love", and "Now and Then". Ono says that it was Harrison and former Beatles road manager Neil Aspinall who initially asked her about the concept of adding vocals and instrumentation to Lennon's demo tapes. Ono stated: "People have said it was all agreed when Paul came over to New York to induct John into the Rock and Roll Hall of Fame, but it was all settled before then. I just used that occasion to hand over the tapes personally to Paul."  McCartney went to Ono's home after the induction ceremony at the Rock and Roll Hall of Fame to listen to, and receive, the Lennon demo tapes; he recalls the meeting with Ono:  She was there with Sean ... and she played us a couple of tracks. There were two newies on mono cassettes which he did at home ... [s]o I checked it out with Sean, because I didn't want him to have a problem with it. He said, "Well, it'll be weird hearing a dead guy on lead vocal. But give it a try." I said to them both, "If it doesn't work out, you can veto it." When I told George and Ringo I'd agreed to that they were going, "What? What if we love it?" It didn't come to that, luckily. I said to Yoko, "Don't impose too many conditions on us, it's really difficult to do this, spiritually. We don't know, we may hate each other after two hours in the studio and just walk out. So don't put any conditions, it's tough enough."  During an interview for the Anthology project, McCartney revealed that he was surprised to learn that Lennon's demos of "Grow Old With Me" and "Real Love" had already been released and were well known by Lennon fans. Starr admitted that when he first listened to the recording he found it very emotional.

what were the four songs

OUT: were "Grow Old With Me", "Real Love", and "Now and Then".

Answer the question at the end by quoting:

The National Inventors Hall of Fame (NIHF) is an American not-for-profit organization which recognizes individual engineers and inventors who hold a U.S. patent of highly significant technology. Founded in 1973, its primary mission is to "honor the people responsible for the great technological advances that make human, social and economic progress possible." Besides the Hall of Fame, it also operates a museum in Alexandria, Virginia, and a middle school in Akron, Ohio, and sponsors educational programs, a collegiate competition, and special projects all over the United States to encourage creativity among students. As of 2018, 562 inventors have been inducted, mostly constituting historic persons from the past three centuries, but including about 100 living inductees.
In Alexandria, the National Inventors Hall of Fame operates a museum in the U.S. Patent and Trademark Office building at 600 Dulany Street, with a gallery of digital portraits of the honorees, interactive kiosks and a theater. Admission is free.  In addition to the exhibits of the artifacts and documents from the collections of the Patent and Trademark Office, it also promotes future generations of inventors by sponsoring the Invent Now Kids program, Camp Invention, Club Invention and the Collegiate Inventors Competition as well as, with national partners, many ventures and special projects.  Camp Invention, founded in 1990, is a daytime summer camp for children, with program sites in 49 states. Camp Invention is the only nationally recognized summer program focused on creativity, innovation, real-world problem solving and the spirit of the invention.  The Collegiate Inventors Competition was created in 1990 to encourage college and university students to be creative and innovative with science, engineering and technology for dealing with the problems of the world. Since then, with the help from the sponsors, it has awarded more than $1 million to the winning students in two categories, undergraduate and graduate. In 2012, the first places were won with a delivery therapy for treating cancer and a way to facilitate suturing in abdominal surgery. Other finalists included the use of CT scanning and 3-D printing technology to replicate an amputee's lost hand, a low-profile shoulder brace that can be applied by the athletes themselves, and an electric motorcycle that runs on spheres instead of wheels.

what types of activities took place?

it also promotes future generations of inventors by sponsoring the Invent Now Kids program, Camp Invention,

input: Maya inscriptions occasionally mention predicted future events or commemorations that would occur on dates far beyond the completion of the 13th b'ak'tun. Most of these are in the form of "distance dates"; Long Count dates together with an additional number, known as a Distance Number, which when added to them makes a future date. On the west panel at the Temple of Inscriptions in Palenque, a section of text projects forward to the 80th 52-year Calendar Round from the coronation of the ruler K'inich Janaab' Pakal. Pakal's accession occurred on 9.9.2.4.8, equivalent to 27 July 615 AD in the proleptic Gregorian calendar. The inscription begins with Pakal's birthdate of 9.8.9.13.0 (24 March, 603 AD Gregorian) and then adds the Distance Number 10.11.10.5.8 to it, arriving at a date of 21 October 4772 AD, more than 4,000 years after Pakal's time.  Another example is Stela 1 at Coba which marks the date of creation as 13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.0.0.0.0, or nineteen units above the b'ak'tun. According to Linda Schele, these 13s represent "the starting point of a huge odometer of time", with each acting as a zero and resetting to 1 as the numbers increase. Thus this inscription anticipates the current universe lasting at least 2021x13x360 days, or roughly 2.687x1028 years; a time span equal to 2 quintillion times the age of the universe as determined by cosmologists. Others have suggested, however, that this date marks creation as having occurred after that time span.  In 2012, researchers announced the discovery of a series of Maya astronomical tables in Xultun, Guatemala which plot the movements of the Moon and other astronomical bodies over the course of 17 b'ak'tuns.

Answer this question "What are important dates beyond b'ak'tun 13?"
output:
Another example is Stela 1 at Coba which marks the date of creation as 13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.0.0.0.0, or nineteen units above the b'ak'tun.