Task: Question Answering
Input (English): Passage: The Seahawks' third game was played at home ground when they played their former division rival, the San Diego Chargers. In the second quarter Seattle took the early lead when kicker Olindo Mare made a 23-yard field goal. Then QB Matt Hasselbeck completed a 9-yard TD pass to TE John Carlson. This was followed in the third quarter by RB Leon Washington returning a kickoff 101 yards to the endzone for a touchdown. The lead was broken down with QB Philip Rivers getting a 3-yard TD pass to WR Malcolm Floyd, followed by Hasselbeck getting sacked by ILB Brandon Siler in the endzone for a safety. Then kicker Nate Kaeding made a 29-yard field goal. The Seahawks increased their lead when Mare made a 23-yard field goal, but the Chargers replied and tied the game when Rivers found TE Antonio Gates on a 12-yard TD pass. (With a successful 2-point conversion as Rivers found WR Legedu Naanee). Before the clock struck zero Seattle took the winning score as RB Leon Washington returned his second kickoff of the game into the endzone running 99 yards for a touchdown. Rivers and the Chargers attempted to make a comeback with less than a minute left, but was picked off by rookie Earl Thomas to seal the win for Seattle. 
Question: How many yards was the longest touchdown of the game? 
Answer type: Number 
Output (English): 101.