Problem: Armando Christian Perez (born January 15, 1981), known by the stage name Pitbull or Mr. Worldwide, is an American rapper. His first recorded mainstream performance was on a solo track from Lil Jon's 2002 album Kings of Crunk. In 2004, Pitbull released his debut album M.I.A.M.I. under TVT Records. It included production producers Lil Jon and Jim Jonsin.

In 2004, Pitbull released his debut album M.I.A.M.I., with the lead single being "Culo" produced by Lil Jon and the Diaz Brothers. It peaked at No. 32 on the Billboard Hot 100 chart and No. 11 on the Hot Rap Tracks chart. Other singles included "Dammit Man", "Back Up", "Toma", and "That's Nasty" (both featuring Lil Jon). He joined the Anger Management Tour, the 2000 hip-hop concert tour headlined by Eminem and 50 Cent. Pitbull also appeared on the Ying Yang Twins' single "Shake", which peaked at No.41 on the Hot 100 and No.12 on the rap chart, Adassa's chart topping single "Kamasutra" & Twista's "Hit the Floor" (#94 Hot 100, No. 20 Rap). Remix album Money Is Still a Major Issue was released in November 2005; it included new track "Everybody Get Up", a duet with hip-hop/R&B group Pretty Ricky.  TVT Records, Pitbull's label at the time, and Slip-n-Slide Records disputed over the release of Welcome to the 305, an unreleased album by Slip-n-Slide that Pitbull had recorded in 2001. A Miami judge ruled that Slip-n-Slide had a legal right to release the album as it was recorded when Pitbull was a Slip-N-Slide artist, and prior to him signing with TVT Records. A U.S. District Court judge affirmed the decision further. TVT was then ordered in March 2007 to pay Slip-n-Slide $9.1 million for attempting to block the album's release to record stores and digital download entities.  In 2005 Pitbull and rapper Sean 'Diddy' Combs co-founded Bad Boy Latino, a subsidiary of Combs' Bad Boy Records label. It primarily focuses on Latin hip hop, Latin soul, Latin pop and other tropical music and has offices in New York and Miami, Florida. Along with co-founding it, Perez currently heads the A&R division of the label.

did he appear on anyone else's songs?

Answer with quotes: Adassa's chart topping single "Kamasutra" & Twista's "Hit the Floor" (#

Background: Marudur Gopalan Ramachandran (17 January 1917 - 24 December 1987), popularly known as M.G.R., was an Indian actor, filmmaker and politician who served as the Chief Minister of Tamil Nadu for ten years between 1977 and 1987. MGR is a cultural icon in the Indian state of Tamil Nadu, and he is regarded as one of the most influential actors of the Tamil film industry. He was popularly known as "Makkal Thilagam" (People's King) as he was popular with the masses. In his youth, MGR and his elder brother M. G. Chakrapani became members of a drama troupe to support their family.
Context: The actor and politician M. R. Radha and MGR had worked in 25 films together. On 12 January 1967, Radha and a producer visited MGR to talk about a future film project. During the conversation, M. R. Radha stood up and shot MGR in his left ear twice and then tried to shoot himself.  After the operation, MGR's voice changed. Since he had been shot in his ear, MGR lost hearing in his left ear and had ringing in the ear problems. These further surfaced in 1983 when he had kidney problems. When Sinnappa Devar paid his first visit to see MGR at the hospital after the shooting incident he paid MGR an advance for MGR's next movie. After getting released from the hospital and finishing Arasakattalai, MGR acted in Devar's movie Vivasaayee against doctors' advice. Due to the operation, MGR's speaking parts in the movie Kaavalkaaran were reduced. This was the only movie in which MGR spoke with old and new voices between scenes: MGR was acting in the film Kaavalkaran in 1967 opposite J. Jayalalithaa when the shooting occurred.  Petralthaan Pillaya was the last movie of MGR-MR Radha together. Shooting ended just few days before MGR was shot. The bullet was permanently lodged in his neck and his voice damaged. Within hours of the shooting, some 50,000 fans had gathered at the hospital where MGR had been taken. People cried in the streets. For six weeks, he lay in the hospital as fans awaited each report of his health. He was visited by a steady stream of commoners and luminaries of film industry, polity and bureaucracy. From his hospital bed, he conducted his campaign for the Madras Legislative Assembly. He won twice the number of votes polled by his Congress rival and the largest vote polled by any candidate for the Assembly.
Question: Was he arrested?
Answer: 

Question:
Ahmed Yassin was born in al-Jura, a small village near the city of Ashkelon, in the British Mandate of Palestine. His date of birth is not known for certain: according to his Palestinian passport, he was born on 1 January 1929, but he claimed to have actually been born in 1937. His father, Abdullah Yassin, died when he was three years old. Afterward, he became known in his neighborhood as Ahmad Sa'ada after his mother Sa'ada al-Habeel.
Yassin was a founder and prominent leader of Hamas, which is regarded as a terrorist organization by a number of national governments. Israeli Prime Minister Ariel Sharon characterized Yassin as the "mastermind of Palestinian terror" and a "mass murderer." The Israeli government repeatedly asserted that Yassin was responsible for a number of terrorist attacks, which targeted and killed a number of civilians. They accused him of being behind all the attacks perpetrated by Hamas against Israel. Israel said the targeted killing was in response to dozens of suicide attacks by Hamas against Israeli civilians. According to an Israeli government website:  Yassin was the dominant authority of the Hamas leadership, which was directly involved in planning, orchestrating and launching terror attacks carried out by the organization. In this capacity, Yassin personally gave his approval for the launching of Qassam rockets against Israeli cities, as well as for the numerous Hamas terrorist bombings and suicide operations. In his public appearances and interviews, Yassin called repeatedly for a continuation of the 'armed struggle' against Israel, and for an intensification of the terrorist campaign against its citizens. The successful operation against Yassin constitutes a significant blow to a central pillar of the Hamas terrorist organization, and a major setback to its terrorist infrastructure.  In his statement Yassin declared that Hamas did target Israeli civilians, but only in direct retaliation for the death of Palestinian civilians. In his thinking this was a necessary tactic to "show the Israelis they could not get away without a price for killing our people."
Answer this question using a quote from the text above:

what is the most important fact mentioned in this article?

Answer:
Yassin declared that Hamas did target Israeli civilians, but only in direct retaliation for the death of Palestinian civilians.