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 was invented in the 16th century.
( z1 invent :ARG1 ( z2 pool ) :time ( z3 date-entity :century 16 ) )