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.
You need a house ball to bowl a strike
The context says you can either choose a house ball or buy your own to bowl a strike. It is definitely incorrect to say you need a house ball to get a strike
( z1 need :ARG0 ( z2 you ) :ARG1 ( z3 ball :mod ( z4 house ) ) :purpose ( z5 bowl :ARG0 z2 :ARG1 ( z6 strike :ARG0 z2 ) ) )