Problem: Background: Christopher Duan Johnson (born September 23, 1985) is an American football running back who is currently a free agent. Born in Orlando, Florida, Johnson emerged as a senior for East Carolina University where he broke out for 2,960 all-purpose yards and 24 touchdowns. He was drafted by the Tennessee Titans in the first round of the 2008 NFL Draft, after running a then-record breaking 4.24 seconds in the 40-yard dash at the NFL Combine. In 2009, he won the NFL rushing title with 2,006 yards (the sixth of only seven players ever to gain over 2,000 in a season), and broke Marshall Faulk's record of total yards from scrimmage with 2,509.
Context: During the summer training camp prior to the 2011 season, Johnson initially did not show up to camp, pending contract negotiations. Johnson felt he was due a considerably larger sum of money. As the leading rusher since 2008 (4,598 yards) he was set to make $1.065 million in 2011, under existing contract terms (approximately 10% of the money paid to the second-place rusher for the same period). On September 1, Johnson became the highest paid running back in the NFL, agreeing to a four-year, $53.5 million contract extension, including $30 million guaranteed, with the Titans, ending his holdout.  In early November, a report surfaced that Johnson could be released by the Titans prior to the fifth day of the 2012 league year, which begins every March. At the time of the report, Johnson was having the worst season of his career with just 302 rushing yards and one touchdown on 107 carries through the season's first seven games. Johnson's contract calls for an $8 million salary in 2012 that became guaranteed in March; he also will receive a guaranteed salary of $9 million since the fifth day of the 2013 league year passed. If the Titans had released Johnson prior the March 2012 deadline, they would have saved $17 million and Johnson would have become a free agent. On November 13, he had 130 rushing yards and a rushing touchdown against the Carolina Panthers. Two weeks later, he had 190 rushing yards against the Tampa Bay Buccaneers. in the next game, against the Buffalo Bills, he had 153 rushing yards and two rushing touchdowns.  During the 2011 season, Johnson struggled throughout the season under offensive coordinator Chris Palmer. However, he still finished with 1,047 rushing yards and four rushing touchdowns. After a frustrating season, Johnson elected to participate in the Titans' off-season training program in preparation for the 2012 season.
Question: What were some of his statistics during the 2011 season?
Answer: 1,047 rushing yards and four rushing touchdowns.

Problem: Background: Gaelic Ireland (Irish: Eire Ghaidhealach) was the Gaelic political and social order, and associated culture, that existed in Ireland from the prehistoric era until the early 17th century. Before the Norman invasion of 1169, Gaelic Ireland comprised the whole island. Thereafter, it comprised that part of the country not under foreign dominion at a given time. For most of its history, Gaelic Ireland was a "patchwork" hierarchy of territories ruled by a hierarchy of kings or chiefs, who were elected through tanistry.
Context: For most of the Gaelic period, dwellings and farm buildings were circular with conical thatched roofs (see roundhouse). Square and rectangle-shaped buildings gradually became more common, and by the 14th or 15th century they had replaced round buildings completely. In some areas, buildings were made mostly of stone. In others, they were built of timber, wattle and daub, or a mix of materials. Most ancient and early medieval stone buildings were of dry stone construction. Some buildings would have had glass windows. Among the wealthy, it was common for women to have their own 'apartment' called a grianan (anglicized "greenan") in the sunniest part of the homestead.  The dwellings of freemen and their families were often surrounded by a circular rampart called a "ringfort". There are two main kinds of ringfort. The rath is an earthen ringfort, averaging 30m diameter, with a dry outside ditch. The cathair or caiseal is a stone ringfort. The ringfort would typically have enclosed the family home, small farm buildings or workshops, and animal pens. Most date to the period 500-1000 CE and there is evidence of large-scale ringfort desertion at the end of the first millennium. The remains of between 30,000 and 40,000 lasted into the 19th century to be mapped by Ordnance Survey Ireland. Another kind of native dwelling was the crannog, which were roundhouses built on artificial islands in lakes.  There were very few nucleated settlements in Gaelic areas. However, after the 5th century some monasteries became the heart of small "monastic towns". By the 10th century the Norse-Gaelic ports of Dublin, Wexford, Cork and Limerick had grown into substantial settlements. It was at this time, perhaps as a response to Viking raids, that many of the Irish round towers were built.  In the fifty years before the Norman invasion, the term "castle" (Old Irish: caistel/caislen) appears in Gaelic writings, although there are no surviving examples of pre-Norman castles. After the invasion, the Normans built motte-and-bailey castles in the areas they occupied, some of which were converted from ringforts. By 1300 "some mottes, especially in frontier areas, had almost certainly been built by the Gaelic Irish in imitation". The Normans gradually replaced wooden motte-and-baileys with stone castles and tower houses. Tower houses are free-standing multi-storey stone towers usually surrounded by a wall (see bawn) and ancillary buildings. Gaelic families had begun to build their own tower houses by the 15th century. As many as 7000 may have been built, but they were rare in areas with little Norman settlement or contact. They are concentrated in counties Limerick and Clare but are lacking in Ulster, except the area around Strangford Lough.  In Gaelic law, a 'sanctuary' called a maighin digona surrounded each person's dwelling. The maighin digona's size varied according to the owner's rank. In the case of a boaire it stretched as far as he, while sitting at his house, could cast a cnairsech (variously described as a spear or sledgehammer). The owner of a maighin digona could offer its protection to someone fleeing from pursuers, who would then have to bring that person to justice by lawful means.
Question: What other materials did they use to build?
Answer:
while sitting at his house, could cast a cnairsech (variously described as a spear or sledgehammer