How to choose an ergonomic office chair<br>Look for the ability to adjust the chair's height. The height of your ergonomic chair should be fully adjustable. The chair's seat should be easy to move either upwards or downwards.
Moving the seat of an ergonomic chair to higher or lower postition is one of the most important things to consider when choosing a new chair if not the most important
The whole passage is about how the flexible movement of the seat is very important. I think it tricked the system by being a long sentence
( z1 have-condition :ARG1 ( z2 move :ARG1 ( z3 seat :part-of ( z4 chair :mod ( z5 ergonomic ) ) ) :ARG2 ( z6 or :op ( z7 position :ARG1-of ( z8 have-degree :ARG2 ( z9 high ) :ARG3 ( z10 more ) ) ) :op ( z11 position :ARG1-of ( z12 have-degree :ARG2 ( z13 low ) :ARG3 ( z14 more ) ) ) ) ) :ARG1-of ( z15 consider :time ( z16 choose :ARG1 ( z17 chair :ARG1-of ( z18 new ) ) ) ) :ARG1-of ( z19 have-degree :ARG2 ( z20 important :ARG1 z2 ) :ARG3 ( z21 most ) ) )