Sentence 1: Tom loved to go fishing on the lake with his dad. 
 Sentence 3: Tom decided to fishing by himself instead 
 Sentence 4:  Tom saw a gigantic fish at the lake, but failed to catch it 
 Sentence 5:  He told his dad that night, who promised he would help next time 
 Given Sentence 2: After a couple of hours he realized it was stuck in his head.