Several men are tinkering with radio controlled items.
There are men testing out their drones in the park.
Just because the men are tinkering does not mean they are testing.
exists e1 e2 s1 x1 x2 x3.(with(e1,x2) & n_item(x2) & Theme(e2,x2) & v_control(e2) & of(x2,x3) & n_radio(x3) & Actor(e1,x1) & v_tinker(e1) & n_man(x1) & a_several(s1) & Theme(s1,x1))
exists p1 x1 x5.(n_park(x5) & exists e1 s1 x2 x3 x4.((x1 = x2) & in(e1,x5) & a_out(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_test(e1) & n_drone(x4) & of(x4,x2) & n_thing(x2) & (x2 = x3) & n_man(x2)))