Sentence 1: Trent's kids had all moved out the house. 
 Sentence 3: Trent had a lot of paperwork to file 
 Sentence 4:  He decided to convert one of the bedrooms 
 Sentence 5:  Trent converted one of the kid's old rooms to an office 
 Given Sentence 2: In the air, I saw a bright flash accompanied with a loud noise.