How to get the correct posture in ballet<br>Gain knowledge about the types of ballet. [substeps] Choose the hand of your choice. With the palm of that hand facing the floor, place it in the space beneath the middle of you back, but above your tailbone.
Correct posture cannot be obtained by a layman.
A lay person would be someone who has no knowledge of ballet. The scenario states that knowledge should be gained, suggesting someone who is not a lay person.
( z1 possible :polarity - :ARG1 ( z2 obtain :ARG0 ( z3 layman ) :ARG1 ( z4 posture :ARG1-of ( z5 correct ) ) ) )