Sentence 1: Jeremy bought diving equipment and took lessons. 
 Sentence 3: Later, he went out to the lake with his gear and jumped in 
 Sentence 4:  He swam around and found treasures at the bottom of the lake 
 Sentence 5:  Jeremy happily swam to the surface with his new trophies 
 Given Sentence 2: A school zone was looming ahead, but Mary didn't see it.