A man wearing a red shirt and work gloves, is smoothing out some gravel underneath a building.
The man is smoothing out the clay.
In sentence 1, the man is smoothing gravel, but in sentence 2, he is smoothing clay.  Clay and gravel are not the same substance.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(a_out(s2) & Manner(e2,s2) & Theme(e2,x7) & Actor(e2,x1) & v_smooth(e2) & underneath(x7,x8) & n_building(x8) & n_gravel(x7) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & subset_of(x5,x3) & n_glove(x5) & of(x5,x6) & n_work(x6) & subset_of(x4,x3) & n_shirt(x4) & a_red(s1) & Theme(s1,x4) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2.(n_clay(x2) & n_man(x1) & a_out(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_smooth(e1))