Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Q: crane, ostrich, davit, dump truck, pelican

A: dump truck
****
Q: falsification, fib, invent, fudge, cupcake

A: cupcake
****
Q: fish, shark, dog, dolphin, trap

A:
trap
****