Sentence 1: Dan heard a tune that he really enjoyed while driving. 
 Sentence 3: Dan asked several friends if they knew the tune 
 Sentence 4:  Dan felt frustrated by not knowing who did the tune 
 Sentence 5:  Late that night, Dan woke up, finally remembering whose tune it was! 
 Option 1: The announcer never stated what it was or who the tune was by. 
 Option 2: The announcer stated what it was and who the tune was by.