The bird's feet are grasping the window tightly.
The fire breathing bird burns down the house
The bird cannot be grasping the window tightly with its fee and breathing fire to burn down the house at the same time.
exists e1 s1 x1 x2 x3.(n_window(x3) & n_foot(x2) & of(x2,x1) & n_bird(x1) & a_tightly(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_grasp(e1))
exists e1 s1 x1 x2 x3 x4.(n_house(x4) & n_bird(x1) & of(x1,x3) & n_breathing(x3) & of(x1,x2) & n_fire(x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x1) & v_burn(e1))