#!/opt/local/bin/swipl -l
food(apple).
food(broccoli).
food(carrot).
food(lettuce).
food(rice).
food('bell pepper').
food('Whopper').
food('Big Mac').
foo(ribs).

color(grass, green).

odd(1).

number(uno, 1, 'Spanish').

+/-(3,4).		% functor is symbolic atom

lunch(sandwich(ham), fries, drink(coke)).