Buy food has a prerequisite of buy kit and some glue. Buy food has a prerequisite of start car engine. Buy present has a prerequisite of shop. Shop does not have a prerequisite of ask them what they need. Buy present has a prerequisite of go to mall. Buy present causes happiness. Drive has a prerequisite of start car engine. Feed your family has a prerequisite of buy kit and some glue. Buy present does not have a prerequisite of ask them what they need. Shop has a prerequisite of go to mall. Go to mall has a prerequisite of drive. Buy present does not have a prerequisite of find place to exercise.
Drive does not have a prerequisite of operate system.