Sentence 1: Jan's mom cooked her eggs every morning. 
 Sentence 3: She swallowed them down to make her mom happy 
 Sentence 4:  One day Jan broke out in hives and had to go to the doctor 
 Sentence 5:  It was determined Jan was allergic to eggs and never ate them again 
 Given Sentence 2: The shelter requires the adopted dogs to be spayed or neutered.