Task: Question Answering
Input (English): Passage: 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.HOUSTON - DEFENSE: DE Antonio Smith, DT Shaun Cody, DT Amobi Okoye, DE Mario Williams, LB Brian Cushing, LB Kevin Bentley, LB Darryl Sharpton, CB Glover Quinn, CB Kareem Jackson, SS Bernard Pollard, FS Eugene Wilson.Coming off their shutout win over the Titans, the Texans flew to Lincoln Financial Field for a Week 13 interconference duel with the Philadelphia Eagles on Thursday night.  Houston trailed early in the first quarter as Eagles quarterback Michael Vick completed a 1-yard touchdown pass to running back LeSean McCoy.  The Texans answered with a 48-yard field goal from kicker Neil Rackers, but Philadelphia struck back with McCoy getting a 4-yard touchdown run, followed by kicker David Akers getting a 36-yard field goal.  Houston replied with quarterback Matt Schaub finding wide receiver Jacoby Jones on an 8-yard touchdown pass.  The Eagles would close out the half with Akers making a 22-yard field goal. The Texans took the lead in the third quarter with running back Arian Foster catching a 13-yard touchdown pass from Schaub and getting a 3-yard touchdown run.  Philadelphia regained the lead with Vick getting a 2-yard touchdown run, followed by his 5-yard touchdown pass to fullback Owen Schmitt.  Houston tried to rally, but the Eagles' defense prevented any progress. 
Question: How many defense players are mentioned? 
Answer type: Number 
Output (English): 11.