A boy travels through a brick walkway.
A boy is  biking
The boy does not have to be biking to travel
exists e1 x1 x2 x3.(through(e1,x2) & n_walkway(x2) & of(x2,x3) & n_brick(x3) & Actor(e1,x1) & v_travel(e1) & n_boy(x1))
exists e1 x1.(Actor(e1,x1) & v_bike(e1) & n_boy(x1))