Standing in line to check out the groceries.
People are standing in a slow line to check out their groceries
Just because people are standing it does not mean the line is slow to check out groceries.
exists e1 p1 x1 x2 x3.(n_grocery(x3) & in(e1,x2) & Topic(x2,p1) & exists e2 s1.(a_out(s1) & Manner(e2,s1) & Theme(e2,x3) & Actor(e2,x2) & v_check(e2)) & n_line(x2) & Actor(e1,x1) & v_stand(e1) & n_thing(x1))
exists e1 p1 s1 x1 x2 x3 x4.(Topic(e1,p1) & exists e2 s2.(a_out(s2) & Manner(e2,s2) & Theme(e2,x4) & Actor(e2,x1) & v_check(e2)) & n_grocery(x4) & of(x4,x1) & n_thing(x1) & in(e1,x3) & n_line(x3) & a_slow(s1) & Theme(s1,x3) & Actor(e1,x2) & v_stand(e1) & n_people(x2) & n_people(x1))