You have to push on the steps ahead of you and see if the materials shift. Obviously the smoke itself is the biggest barrier right now to proceed in those areas, she added. Some ventilation fans are set up, but Cominsky said they are limited because more air can also help the fire expand. Its the waiting, one woman said. A total of 120 building residents have been located.
Heat is definitely a barrier to some ventilation fans.
( z0 barrier :beneficiary ( z1 fan :quant ( z2 some ) :ARG0-of ( z3 vent ) ) :domain ( z4 heat ) :mod ( z5 definite ) )
(z0 / barrier
    :beneficiary (z1 / fan
                     :quant (z2 / some)
                     :ARG0-of (z3 / vent-01))
    :domain (z4 / heat)
    :mod (z5 / definite))
Heat is definitely a barrier to some ventilation fans .
z0 :mod z5
z0 :domain z4
z1 :ARG0-of z3
z1 :quant z2
z0 :beneficiary z1