A man using a bulldozer or Bobcat to dig earth.
A man building the foundation of a school.
Not everyone digging earth with a bulldozer or Bobcat is building the foundation of a school.
exists e1 p1 x1 x2 x3.(a_topic(x1) & Theme(e1,p1) & Recipient(e1,x3) & Actor(e1,x2) & v_use(e1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x2) & v_dig(e2) & n_earth(x4)) & (n_bulldozer(x3) | n_bobcat(x3)) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_foundation(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_build(e1) & of(x3,x4) & n_school(x4) & (x1 = x2) & n_man(x1))