During run 21, the wind appeared to mostly blow towards the right side of the tank, and during runs 20, 22, and 23 the wind was intermittently blowing towards either side of the tank.
(the wind; appeared; T:During run 21) (the wind; to blow; towards the right side of the tank) (23 the wind; was intermittently blowing; towards either side of the tank)
the wind the wind 23 the wind
appeared to blow was intermittently blowing
T:During run 21
towards the right side of the tank
towards either side of the tank