People are protesting against coal.
There are people protesting.
People are protesting against coal means people are protesting.
exists e1 x1 x2.(against(e1,x2) & n_coal(x2) & Actor(e1,x1) & v_protest(e1) & n_people(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_protest(e1) & (x2 = x3) & n_people(x2))