Sentence 1: Tim and Jan find a puppy on their doorstep. 
 Sentence 3: When their landlord finds out he demands that they get rid of the dog 
 Sentence 4:  The next day they see a flyer with a picture of the missing puppy 
 Sentence 5:  They reluctantly decide to give the dog back to it's owner 
 Option 1: They decide to keep him even though their landlord doesn't allow pets. 
 Option 2: They decide to keep him because their landlord said it was OK.