This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.

Passage: Ryan Mallett was given the starting quarterback position against the Panthers. The Texans only lead of the game came in the first quarter following a 43-yard field goal from Randy Bullock. Following 10 unanswered points from Carolina in the 2nd quarter, Houston trailed 3-10 going into halftime. Early in the third quarter Houston tied the game at 10 a piece. A Carolina touchdown late in the 3rd quarter and another early in the 4th sealed a Panthers victory as the Texans couldn't manage a comeback. With the loss Houston dropped to 0-2, their worst start since the 2008 season.
Question: How many points were scored in the first half?
Answer type: Number
13.