Given the task definition and input, reply with output. This task involves annotating the answer type to a given question that involve some kind of complex reasoning (including numerical reasoning). Note that the questions require looking at more than one part of the passage to answer. There are 3 possible answer types (i) spans, (ii) numbers and (iii) dates. If the answer can be found in the passage, label it as "span". If the answer is a number, label as "number". Similarly, label "date" if you think the answer to the given question is a date.

Passage: Offensive futility plagued both teams in the first half, with Minnesota kicking a field goal as time expired in the second quarter to take a 3-0 lead into halftime. Trailing 10-6 in the fourth quarter, Mike Glennon threw a 7-yard touchdown pass to Austin Seferian-Jenkins with 2:02 remaining in regulation. The Buccaneers briefly took a 13-10 lead, but the Vikings were able to tie the game at 13-13 and force overtime. In the overtime period, Tampa Bay won the coin toss and received. On the first play from scrimmage in overtime, Austin Seferian-Jenkins caught a 10-yard pass at the 27 yard line, but fumbled the ball as he was tackled. Anthony Barr scooped up the ball and returned it 27 yards for a touchdown, and Minnesota won 19-13.
Question: How many points did the Buccaneers trail by at the start of the fourth quarter?
number