TASK DEFINITION: Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
PROBLEM: Category: mode of transportation 
Words: beetle, fly, soar, bus, car

SOLUTION: beetle

PROBLEM: Category: construction 
Words: excavator, steam roller, concrete pourer, swallow, crane

SOLUTION: swallow

PROBLEM: Category: mode of transportation 
Words: jog, bike, fly, drive, jump

SOLUTION:
jump