Sentence 1: Tony and Martha couldn't find their pig, Porky, anywhere. 
 Sentence 3: They approached everyone on the streets of nearby blocks 
 Sentence 4:  One person said he thought he saw a pig running up the block 
 Sentence 5:  They drove up the block and found a party charbroiling a whole pig 
 Given Sentence 2: They decided to drive around the neighborhood and find Porky.