Little boy with blue shirt crawls across vents near large glass windows.
The small child is crawling around.
A little boy is also a small child. Crawling across vents qualifies as crawling around.
exists s1 s2 s3 x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & across(x2,x4) & near(x4,x5) & n_window(x5) & of(x5,x6) & n_glass(x6) & a_large(s3) & Theme(s3,x5) & n_vent(x4) & n_crawl(x2) & of(x2,x3) & n_shirt(x3) & a_blue(s2) & Theme(s2,x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 p1 s1 x1.(n_child(x1) & a_small(s1) & Theme(s1,x1) & exists s2.(Theme(s2,x1) & a_around(s2)) & Topic(e1,p1) & Actor(e1,x1) & v_crawl(e1))