Sentence 1: Julia was waiting to cross the street when she saw an old man. 
 Sentence 3: She ran to him and escorted him back to safety 
 Sentence 4:  The old man admitted he was lost 
 Sentence 5:  And after asking his address, she took him home 
 Option 1: He was trying to cross the traffic on a green light. 
 Option 2: He was seated at a restaurant table, having lunch.