How to trim bangs between haircuts<br>Obtain your tools. You will need a fine-tooth comb and sharp hair-cutting scissors for trimming bangs. You will also need bobby pins and/or hair ties to tie or pin your hair back.
You will need to tie or pin your hair back when trimming bangs.
The context suggests how to tie or pin you hair back if needed.  Obviously, not every one would have hair long enough for that to be necessary.
( z1 need :ARG0 ( z2 you ) :ARG1 ( z3 or :op ( z4 tie :ARG0 z2 :ARG1 ( z5 hair :part-of z2 ) :ARG2 ( z6 back ) ) :op ( z7 pin :ARG0 z2 :ARG1 z5 :ARG2 z6 ) ) :time ( z8 trim :ARG0 z2 :ARG1 ( z9 bang ) ) )