How to rack a pool table<br>Start off with the 1-ball at the front of the rack. This is also called the " apex " of the rack Make sure that the 8-ball is in the center of the rack. The center of the rack is the middle of the triangle.
Pool is played with only 8 balls.
It is not mentioned how many total balls are used to play, we know that there is an 8-ball, so presumably there are at least 8 balls, but it's possible that there are more. It's difficult because the text mentions the word "8-ball" which probably confused the system.
( z1 play :ARG1 ( z2 pool ) :instrument ( z3 ball :quant 8 :mod ( z4 only ) ) )