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.
Q: Passage: The Saints dominated the first quarter and entered halftime riding on a 17-3 lead. Tampa Bay scored two touchdowns in the fourth quarter, including a 77-yard kick return by Micheal Spurlock, to tie the game at 17. As time expired, Garrett Hartley attempted a 37-yard field goal that would have salvaged the game for the Saints, but the kick hooked left. In overtime, Tampa Bay won the coin toss, received the kickoff, and drove down the field to win the game with a field goal, for a final score of 20-17. With the disappointing loss, the Saints fell to 13-2, and appeared to be at risk of losing homefield advantage in the playoffs to the Vikings. However, the Vikings lost in overtime to the Chicago Bears in Week 16's Monday night game, and the Saints clinched the top seed in the NFC.
Question: How many points did The Saints lead by at halftime?
A: 
number