Man with gray hair and a white shirt kneels amid bikes.
The man is a bicycle mechanic.
A man kneels amid bikes doesn't necessarily imply he is a bicycle mechanic.
exists s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & subset_of(x4,x2) & amid(x4,x6) & n_bike(x6) & n_kneel(x4) & of(x4,x5) & n_shirt(x5) & a_white(s2) & Theme(s2,x4) & subset_of(x3,x2) & n_hair(x3) & a_gray(s1) & Theme(s1,x3) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2 x3.((x1 = x2) & n_mechanic(x2) & of(x2,x3) & n_bicycle(x3)))