Cyclist speeding down the trail.
The cyclist is running in the hallway.
A cyclist cannot speed down the hallway  and trail simultaneously.
exists x1 x2 x3.(n_trail(x3) & a_topic(x1) & down(x1,x3) & n_speeding(x1) & of(x1,x2) & n_cyclist(x2))
exists e1 x1 x2.(n_hallway(x2) & n_cyclist(x1) & in(e1,x2) & Actor(e1,x1) & v_run(e1))