Pitchers demonstrating their athleticism.
Pitchers showing off
Demonstrating their athleticism implies showing off.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_demonstrate(e1) & n_athleticism(x3) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_pitcher(x1))
exists e1 s1 x1 x2.(a_topic(x1) & a_off(s1) & Manner(e1,s1) & Actor(e1,x2) & v_show(e1) & (x1 = x2) & n_pitcher(x1))