Read this article and answer this question After a tough loss on the road, the Browns returned home to take on the Ravens.  They would score first in the first quarter when Jason Campbell found Davone Bess on a 1-yard pass for a 7-0 lead.  The Ravens would shorten the lead when Justin Tucker nailed a 51-yard field goal to make it 7-3.  In the second quarter, the Browns moved ahead by double digits when Campbell found Bess again this time on a 20-yard pass for a 14-3 lead.  The Ravens came within 4 again when Joe Flacco found Marlon Brown on a 19-yard pass for a 14-10 game at halftime.  In the third quarter, the Browns moved ahead by double digits again when Campbell found Gary Barnidge on a 4-yard pass to lead 21-10 for the quarter's only score.  In the fourth quarter, the Ravens drew closer as Flacco found Brown again on a 7-yard pass for a 21-18 game.  Though later on, the Browns wrapped up the scoring when Billy Cundiff kicked a 22-yard field goal for a 24-18 final score. With the win and 3-game losing streak snapped, the Browns went into their bye week 4-5.  They would also defeat the Ravens for the first time since 2007 and also snapped their 11-game losing streak against them.
How many touchdown passes did Jason Campbell have in the first half?
2