Teens are riding their bikes through the park near the fountains
There are some bicyclists in the park.
Bikes  and bicycle means the same thing here.
exists e1 x1 x2 x3 x4.(n_fountain(x4) & n_park(x3) & through(e1,x3) & near(x3,x4) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x1) & n_thing(x1) & n_teens(x1))
exists p1 x1 x2.(n_park(x2) & in(p1,x2) & exists x3.((x1 = x3) & n_bicyclist(x3)))