Making a pizza<br>Last night I wanted to make a pizza for my friends. I went out that day to buy the dough and cheese. While I was making the pizza I dropped the dough on the ground. All my friends were very sad. We had to eat sandwiches instead.
Dough and cheese are ingredients for pizza.
( z1 ingredient :domain ( z2 and :op ( z3 dough ) :op ( z4 cheese ) ) :purpose ( z5 pizza ) )