Fantastic curls<br>Lucy really wanted to curl her hair. She needed to know how to do it. She asked her friend to help her. Her friend agreed and said yes. Thankfully when Lucy was done it looked great.
Lucy's friend knew how to curl hair.
There is no proof that Lucy's friend knew any more than Lucy.  They might have just figured it out together.
( z1 know :ARG0 ( z2 person :ARG0-of ( z3 have-rel-role :ARG1 ( z4 person :name ( z5 name :op "Lucy" ) ) :ARG2 ( z6 friend ) ) ) :ARG1 ( z7 curl :ARG0 z2 :ARG1 ( z8 hair ) ) )