Sentence 1: Kim was at work yesterday when she heard a customer yell to call 911. 
 Sentence 3: As they waited she offered assistance to the customer 
 Sentence 4:  She was relieved when the ambulance finally arrived 
 Sentence 5:  She later learned the customer was ok and had only fainted 
 Given Sentence 2: She quickly pulled out her phone and alerted 911 of the emergency.