The boy in the red shirt is skateboarding.
A boy's formerly white shirt is red with blood after his skateboarding accident.
The boy's shirt is initially white and only red with a blood stain.
exists e1 s1 x1 x2.(n_shirt(x2) & a_red(s1) & Theme(s1,x2) & n_boy(x1) & Actor(e1,x1) & v_skateboard(e1) & in(x1,x2))
exists e1 s1 s2 s3 x1 x2 x3 x4.(after(s3,x4) & n_accident(x4) & Actor(e1,x4) & v_skateboard(e1) & of(x4,x1) & n_male(x1) & with(s3,x3) & n_blood(x3) & Theme(s3,x2) & a_red(s3) & n_shirt(x2) & a_white(s2) & Theme(s2,x2) & a_formerly(s1) & Theme(s1,x2) & of(x2,x1) & n_boy(x1))