Two people leaf-blow a sidewalk.
the leafblowers are loud
Not all leafblowers are loud.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_leaf-blow(e1) & n_sidewalk(x2) & n_people(x1) & card_eq_2(x1))
exists s1 x1.(n_leafblower(x1) & Theme(s1,x1) & a_loud(s1))