Question: The coach of the 2017 Houston Texans coached which team from 2012 to 2013?

Context paragraphs:
2002 NFL Draft: The 2002 NFL draft was the procedure by which National Football League (NFL) teams selected amateur college football players.  The draft is known officially as the "NFL Annual Player Selection Meeting" and has been conducted annually since 1936.  The draft took place April 20–21, 2002 at the Theater at Madison Square Garden in New York City, New York.  The draft was broadcast on ESPN both days and eventually moved to ESPN2.  The draft began with the Houston Texans selecting David Carr, and it ended with the Texans selecting Mr. Irrelevant, Ahmad Miller.  There were thirty-two compensatory selections distributed among eighteen teams, with the Buffalo Bills receiving the most selections with four.  The University of Miami was the college most represented in the draft, having five of its players selected in the first round.  Although the Carolina Panthers finished with a 1–15 record which would normally have given them the first pick in each round, the Houston Texans were given the first pick because they were an expansion team.  The league also held a supplemental draft after the regular draft and before the regular season.

Houston Texans: The Houston Texans are a professional American football team based in Houston, Texas.  The Texans compete in the National Football League (NFL) as a member club of the American Football Conference (AFC) South division.  The club first played in as an expansion team, which makes them the youngest franchise currently competing in the NFL.  The Texans replaced Houston's previous franchise, the Houston Oilers, which moved to Nashville, Tennessee and are now the Tennessee Titans.  The team's majority owner is Bob McNair.  While the team mainly struggled in the 2000s, they clinched their first playoff berth during the 2011 season as AFC South division champions.  The Texans have gone on to win more AFC South championships in 2012, 2015, and 2016.  To date, the Texans are the only NFL franchise to have never played in a conference championship game.

Bill O'Brien (American football): William James "Bill" O'Brien (born October 23, 1969) is an American football coach who is the head coach of the Houston Texans of the National Football League (NFL).  He was the head coach of the Penn State Nittany Lions from 2012 to 2013.

2017 Houston Texans season: The 2017 Houston Texans season is the franchise's 16th season in the National Football League and the fourth under head coach Bill O'Brien.

Tom Olivadotti: Tom Olivadotti is a former American football coach.  He coached in high school, college and the National Football League (NFL).  He was the Miami Dolphins defensive coordinator from 1987 to 1995.  He also coached in the NFL for the Cleveland Browns, Minnesota Vikings, New York Giants and Houston Texans.  He coached in college for the Princeton Tigers, Boston College Eagles and Miami Hurricanes, where he was the defensive coordinator for the 1983 championship team.

2013 Houston Texans season: The Houston Texans season was the franchise's 12th season in the National Football League.  The Texans failed to improve upon their 12–4 record from 2012, suffering through a season-ending 14-game losing streak following a 2–0 start and missing the playoffs for the first time since 2010.  Head coach Gary Kubiak was fired after eight seasons following their eleventh loss (Week 14 vs. the Jacksonville Jaguars).  Defensive coordinator Wade Phillips was named the interim head coach for the final three games of the season.  Their 14-game losing streak is the worst in team history.  Coming off a franchise-best 12–4 record just the year before, the Texans tie a league record with the Houston Oilers (who, coincidentally, also went 12–4 in 1993 and 2–14 in 1994) for the biggest season-to-season decline in win total.  On January 3, 2014, claiming that "I'm ready to kick 2013 the hell out the door", Texans owner Robert McNair announced that former Penn State head coach Bill O'Brien would be the Texans' third head coach.

Houston Texans Cheerleaders: The Houston Texans Cheerleaders are the official cheerleading squad of the Houston Texans of the National Football League.  The group has been with the team since the team's inception in 2002.  The squad's tryouts are held at Methodist Training Center.  The group currently has 35 members.  Yearly, the squad releases a swimsuit calendar, having done so since 2008.

2005 Houston Texans season: The 2005 Houston Texans season was the fourth season in franchise history.  The Texans completed the season with the worst record in franchise history (a record that would later be matched in 2013).  This led to the Texans obtaining the first selection in the NFL Draft for the second time since the franchise formed in 2002.  The team fired head coach Dom Capers after the season; he was replaced by Denver Broncos offensive coordinator Gary Kubiak.

2011 Houston Texans season: The Houston Texans season was the team's tenth season in the National Football League (NFL).  The Texans improved on their record from the 2010 season, and earned the franchise's first playoff berth by defeating the Cincinnati Bengals 20–19 in Week 14 and clinching the AFC South.  It also assured the Texans of at least one playoff game at home—the first NFL playoff game in Houston since 1993.  After reaching the Divisional match against the Baltimore Ravens, the Texans suffered their maiden loss in the NFL Playoffs, losing 20–13.

Romeo Crennel: Romeo Crennel (born June 18, 1947) is an American football coach who is the assistant head coach  for the Houston Texans of the National Football League (NFL).  Though he has spent much of his career as a defensive assistant, he has also been the head coach of the Cleveland Browns and the Kansas City Chiefs.  On January 20, 2014, he became the defensive coordinator for the Houston Texans.  He was promoted to assistant head coach prior to the 2017 season.

Supporting paragraphs: 2017 Houston Texans season Bill O'Brien (American football)
Answer: Penn State