Sentence 1: My small school group went on a backpacking trip. 
 Sentence 3: Seven miles up the trail, my small bag of trail mix was unsatisfying 
 Sentence 4:  I spent the rest of the week extremely hungry 
 Sentence 5:  I learned my lesson and always brought plenty of food on later trips 
 Given Sentence 2: I walk back and forth from one end of the house to the other end.