A group of soldiers standing beside a tank.
A group of soldiers are standing guard of the tank
Standing beside something would imply that you are going to do something like guard it.
exists e1 x1 x2 x3 x4.(a_topic(x1) & beside(e1,x4) & n_tank(x4) & Actor(e1,x3) & v_stand(e1) & (x1 = x3) & of(x1,x2) & n_soldier(x2) & n_group(x1))
exists p1 x1 x2 x4.(n_tank(x4) & exists e1 x3.((x1 = x3) & of(x3,x4) & n_guard(x3) & Actor(e1,x3) & v_stand(e1)) & of(x1,x2) & n_soldier(x2) & n_group(x1))