Sentence 1: Harry is a 78 year old PhD who lives in the building. 
 Sentence 3: He is not popular, as he is arrogant 
 Sentence 4:  He had been away, but returned yesterday 
 Sentence 5:  I saw him talking to the concierge, who was not happy 
 Option 1: He doesn't talk to the concierges a lot. 
 Option 2: He talks to the concierges a lot.