premise: A man in gray slacks and sweater observes marker placed in front of a fence in a field.
hypothesis: A man is wearing grey.
explanation_1: In grey means the same as wearing grey
explanation_2: A man wearing grey observes a marker in a field.
explanation_3: Man in gray slacks is the explanation of man is wearing grey/
premise_logic: exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(Theme(e2,x5) & Actor(e2,x1) & v_observe(e2) & in(e1,x9) & n_field(x9) & in(e1,x7) & of(x7,x8) & n_fence(x8) & n_front(x7) & Theme(e1,x6) & v_place(e1) & (x5 = x6) & n_marker(x5) & in(x1,x2) & n_sweater(x4) & n_slacks(x3) & a_gray(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_grey(x2) & n_man(x1))