Instructions: 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.
Input: Passage: Hoping to rebound from their tough road loss to the Patriots, the Ravens went home for a Week 5 AFC North duel with the Cincinnati Bengals. The winner would take the lead in the division after five weeks. After a scoreless first quarter, Baltimore's defense went to work in the second quarter with safety Ed Reed returning an interception 52 yards for a touchdown. The Bengals would answer with a 32-yard field goal from kicker Shayne Graham. Near the end of the third quarter, Cincinnati would take the lead on a 28-yard touchdown run from running back Cedric Benson. The Ravens would respond in the fourth quarter as quarterback Joe Flacco hooked up with running back Ray Rice 48-yard touchdown pass. However, late in the game, the Bengals would deliver the final strike as quarterback Carson Palmer completed a 20-yard touchdown pass to wide receiver Andre Caldwell. Baltimore tried to rally, but an interception from cornerback Leon Hall eliminated any chance of a comeback. Also, the defense's 40-game streak of keeping a single rusher under 100 yards was snapped. The last time that Baltimore allowed a 100-yard rusher was Dec. 10, 2006 against the Chiefs' Larry Johnson.
Question: How many passing touchdowns occurred in the 2nd half?
Answer type: Number
Output:
2.