Bicyclist riding their bikes across a metal bridge.
Bicyclists are riding bikes in a gym.
There is either a bicyclist or bicyclists.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & across(e1,x4) & n_bridge(x4) & of(x4,x5) & n_metal(x5) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_bicyclist(x1))
exists e1 x1 x2 x3.(in(e1,x3) & n_gym(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_bicyclist(x1))