Answer based on context:

After a long break, the Lions hosted the struggling Tampa Bay Buccaneers. Detroit started the scoring with a 6-yard touchdown catch by Calvin Johnson from Matthew Stafford in the first quarter, giving them a lead they kept for the rest of the game. The Buccaneers responded with a 54-yard field goal by Patrick Murray in the second quarter. The Lions added to their lead with a 1-yard touchdown run by Joique Bell, then a 46-yard field goal by Matt Prater. Tampa Bay ended the second quarter with a 5-yard touchdown catch by Mike Evans from Josh McCown, making the score 17-10 at halftime. The Lions added 10 more points to their lead in the third quarter with a  23-yard field goal from Matt Prater, then a 10-yard Joseph Fauria touchdown catch from Matthew Stafford. In the final quarter, Tampa Bay scored their only points of the second half, with a 26-yard touchdown catch by Mike Evans from Josh McCown. The Lions then capped their victory with a 5-yard touchdown catch by Joique Bell off a deflected Matthew Stafford pass. The win gave Detroit a 9-4 record, the first time for the franchise since 1991, keeping them in the hunt for a spot in the playoffs.

How many yards on average were field goals kicked in the first half?
50