Sentence 1: My dog Duke had an affliction where he kept scratching over and over. 
 Sentence 3: We splattered him with used motor oil, and he sat outside for a week 
 Sentence 4:  This was an indoor dog so it was truly sad for him, howling at night 
 Sentence 5:  Turns out it wasn't mange but an allergy to grass, common in mutts 
 Given Sentence 2: The vet told us that it was mange and to treat it with used motor oil.