Boy Scouts are taking a hike.
Girl scouts are selling cookies.
There can be either boy scouts or girl scouts. They can be either taking a hike or selling cookies.
exists e1 x1 x2 x3.(ne_nam_scouts(x1) & (x1 = x2) & ne_nam_boy(x2) & Theme(e1,x3) & Actor(e1,x1) & v_take(e1) & n_hike(x3))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_sell(e1) & n_cookie(x3) & n_scout(x1) & (x1 = x2) & ne_nam_girl(x2))