Sentence 1: When I was three, I was showing off, and stuck a pebble up my nose. 
 Sentence 3: Finally she took me to the emergency room 
 Sentence 4:  The doctor was about to give up and operate when it popped out 
 Sentence 5:  I learned the hard way not to stick foreign objects up my nose 
 Given Sentence 2: My mother tried to pry it out of my nostril for an hour.