Starting lineups: HOUSTON - OFFENSE: QB Matt Schaub, LT Duane Brown, LG Wade Smith, C Chris Myers, RG Mike Brisiel, RT Eric Winston, WR Andre Johnson, RB Arian Foster, FB Vonta Leach, TE Joel Dreessen, WR Kevin Walter.Hoping to snap a four-game losing streak the Texans played on home ground for an AFC South rivalry match against the Titans.  The Texans took control throughout the game as QB Matt Schaub got a 1-yard TD pass to TE Joel Dreessen, followed by his 2-yard TD pass to WR Andre Johnson. The lead was increased when kicker Neil Rackers hit a 35 and a 33-yard field goal. With the easy win, the Texans improved to 5-6.  However, Johnson was ejected following a fight with Titans CB Cortland Finnegan, who was also ejected.
Question: How many WR's are on Houstons starting offense?
Answer: 2