How to bowl a strike<br>Determine whether you will be using a " house ball " or will be buying your own. Most people start with a " house ball " and " house shoes " as this is the cheapest option. There are normally many " house balls " to choose from and these are supplied, free-of-charge, by the bowling alley.
A house ball has three holes in it for your thumb and fingers.
A bowling ball has 3 holes. The system did not know this.
( z1 ball :mod ( z2 house ) :location-of ( z3 hole :quant 3 :location-of ( z4 and :op ( z5 thumb :part-of ( z6 you ) ) :op ( z7 finger :part-of z6 ) ) ) )