The man is driving his equipment under the archway.
The woman is driving his equipment under the archway.
Man and woman are different sexes.  His should be her when referring to a woman.
exists e1 x1 x2 x3.(n_archway(x3) & n_equipment(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & under(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1))
exists e1 x1 x2 x3.(n_archway(x3) & n_equipment(x2) & of(x2,x1) & n_male(x1) & n_woman(x1) & under(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1))