Sentence 1: The Thompson kids found a stray puppy. 
 Sentence 3: Lisa helped the kids make Found posters and put them up 
 Sentence 4:  They contacted the local dog pound, in case someone contacted them 
 Sentence 5:  The puppy's owner was found, appreciative of the Thompsons' aid 
 Given Sentence 2: He is only 3 pounds.