Task: Question Answering
Input (English): Passage: Fresh off their divisional home win over the Bears on Sunday night, the Vikings flew to Ford Field for a Week 14 NFC North rematch with the winless Detroit Lions. Late in the first quarter, Minnesota would trail as Lions kicker Jason Hanson got a 25-yard field goal. In the second quarter, Detroit increased its lead as Hanson got a 23-yard field goal. The Vikings closed out the half with a 35-yard field goal from kicker Ryan Longwell. In the third quarter, Minnesota would take the lead as RB Chester Taylor got a 17-yard TD run. The Lions would reply with QB Daunte Culpepper (a former Viking) completing a 70-yard TD pass to wide receiver Calvin Johnson. In the fourth quarter, the Vikings regained the lead as QB Tarvaris Jackson completed an 11-yard TD pass to TE Visanthe Shiancoe. Detroit tried to rally as Hanson nailed a 39-yard field goal, yet Longwell helped Minnesota pull away with a 50-yard field goal, his fifth 50+ yarder of the season. 
Question: How many yards was the shortest field goal of the first half? 
Answer type: Number 
Output (English): 23.