Sentence 1: The marathon already occurred for thirty minutes. 
 Sentence 3: However, I lost my breath and collapsed on the ground 
 Sentence 4:  The ambulance removed me from the crowd 
 Sentence 5:  They immediately started to deliver fluids intravenously 
 Option 1: All of the runners, including myself, were trying not to stop. 
 Option 2: I decided I wasn't ready and quit running.