A clerk in a convenience store asks a customer buying alcohol for his age and identification.
A clerk in a convenience store doesn't ask a customer
The clerk either asks or doesn't ask, but not both.
exists e1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(for(e1,x7) & n_identification(x9) & n_age(x8) & subset_of(x9,x7) & subset_of(x8,x7) & of(x7,x1) & n_male(x1) & Theme(e1,x4) & Actor(e1,x1) & v_ask(e1) & n_alcohol(x4) & of(x4,x6) & n_buying(x6) & of(x4,x5) & n_customer(x5) & in(x1,x2) & n_store(x2) & of(x2,x3) & n_convenience(x3) & n_clerk(x1))
exists x1 x2 x3.(-exists e1 x4.(Theme(e1,x4) & Actor(e1,x1) & v_ask(e1) & n_customer(x4)) & in(x1,x2) & n_store(x2) & of(x2,x3) & n_convenience(x3) & n_clerk(x1))