Someone is riding a three-wheeled vehicle throught a sandy playground.
The playground has a rubber surface and is empty of people.
Either the playground is rubber or sandy.
exists x1.(all x2 x3.((n_playground(x2) & of(x2,x3) & n_sandy(x3)) -> exists e1 s1 x4 x5.(Theme(e1,x4) & Actor(e1,x1) & v_ride(e1) & for(x4,x2) & n_throught(x4) & of(x4,x5) & n_vehicle(x5) & a_three-wheeled(s1) & Theme(s1,x4))) & n_person(x1))
exists e1 s1 x1 x2 x3 x4.(n_playground(x1) & of(s1,x4) & n_people(x4) & Theme(s1,x1) & a_empty(s1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_surface(x2) & of(x2,x3) & n_rubber(x3))