In week 7, the Lions flew down to Houston, Texas for an interconference duel with the Houston Texans.  In the first quarter, Detroit's slow start continued as Texans QB Matt Schaub completed a 2-yard TD pass to TE Owen Daniels, along with RB Ahman Green getting a 1-yard TD run.  In the second quarter, Houston increased their lead as RB Steve Slaton got a 1-yard TD run.  The Lions responded when kicker Jason Hanson completed a 54-yard field goal. In the third quarter, Detroit began to catch up as rookie RB Kevin Smith got a 26-yard TD run, yet the Texans answered with Schaub completing a 1-yard TD pass to Daniels.  In the fourth quarter, the Lions tried to come back as QB Dan Orlovsky completed a 96-yard TD pass to WR Calvin Johnson, along with Hanson nailing a 54-yard field goal.  However, Houston's defense prevented any comeback from happening.
Question: how many yards did smith run?
Answer: 26