Read this article and answer this question Hoping to rebound from their road loss to the Cardinals, and missing several key starters, the Cowboys flew to the Edward Jones Dome for a Week 7 duel with the St. Louis Rams.  With Tony Romo recovering from his injured pinkie, he was demoted to back-up for the game, allowing veteran QB Brad Johnson to get the start. In the first quarter, the 'Boys shot first as RB Marion Barber got a 1-yard TD run.  The Rams would go on to score 34 unanswered points with QB Marc Bulger completing a 42-yard TD pass to WR Donnie Avery, along with RB Steven Jackson getting an 8-yard and a 1-yard TD run.  In the second quarter, St. Louis increased their lead as kicker Josh Brown got a 52-yard field goal.  In the third quarter, Dallas continued to struggle as Jackson got a 56-yard TD run.  In the fourth quarter, the Rams ended their domination with Brown nailing a 35-yard field goal.  Afterwards, the 'Boys got their only response as Johnson completed a 34-yard TD pass to rookie TE Martellus Bennett.
How many yards was the longest field goal of the game?
52