Sentence 1: I found a swimming pool full of green water this morning. 
 Sentence 3: The sales lady ran tests and sold me quite a lot of chemicals 
 Sentence 4:  I put the chemicals in my pool over the next two days 
 Sentence 5:  Saturday morning my pool finally looks crystal clear and clean 
 Given Sentence 2: I took a water sample to my local pool supply store.