A man sits in a glider cockpit on the landing strip.
The man just landed the glider.
You can not infer there is a glider.
exists e1 x1 x2 x3 x4 x5.(n_strip(x4) & of(x4,x5) & n_landing(x5) & on(e1,x4) & in(e1,x2) & n_cockpit(x2) & of(x2,x3) & n_glider(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 s1 x1 x2.(n_glider(x2) & n_man(x1) & a_just(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_land(e1))