Teacher:In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.
Teacher: Now, understand the problem? Solve this instance: Question: How long was Tim Howard a goalkeeper for Everton? Passage:On 31 August 2013, Ki joined Sunderland on a season-long loan with a mid-season re-call option. He scored his first goal for Sunderland on 17 December 2013 in a 21 League Cup quarter-final win over Chelsea, cutting inside Ashley Cole then beating goalkeeper Mark Schwarzer with a low shot in the 119th minute for the winning goal. On 26 December, he scored his second for Sunderland in a 10 away win over Everton. Everton goalkeeper Tim Howard played a short pass to Leon Osman who was robbed of the ball by Ki. Howard brought Ki down and was sent off, and Ki converted the penalty kick himself to give the Black Cats a vital win. It was Ki's first league goal. Ki's third goal for Sunderland came in a 41 away win at Fulham from a well-worked set piece by Adam Johnson.

Student:
b