The cat is squinting.
The cat is partially shutting it's eyes.
Partially shutting it's eyes is another way to say squinting.
exists e1 x1.(n_cat(x1) & Actor(e1,x1) & v_squint(e1))
exists e1 p1 s1 x1.(n_thing(x1) & n_cat(x1) & a_partially(s1) & Manner(e1,s1) & exists p2 x2.((x1 = x2) & n_eye(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_shut(e1))