A bicyclist is in the mud walking their bicycle.
A bicyclist is riding in the rain.
The bicyclist cannot be walking their bake and riding it at the same time.
exists p1 x1 x2 x4.(n_bicycle(x4) & of(x4,x2) & n_thing(x2) & n_mud(x2) & exists e1 x3.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3)) & n_bicyclist(x1))
exists e1 x1 x2.(n_rain(x2) & in(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicyclist(x1))