A small child crawling on a windowsill.
grown man flounders about on a porch
Small child crawling contradicts with grown man floundering.
exists s1 x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_windowsill(x3) & n_crawling(x1) & of(x1,x2) & n_child(x2) & a_small(s1) & Theme(s1,x1))
(x)