Man sits among bicycles while adjusting the tire on one.
The man is a cyclist.
Sits among bicycles does not imply being a cyclist.
exists e1 e2 x1 x2 x3 x4.(n_tire(x3) & while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_adjust(e2) & on(x3,x4) & n_thing(x4) & card_eq_1(x4) & among(e1,x2) & n_bicycle(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2.((x1 = x2) & n_cyclist(x2)))