Friction means the energy of the airflow is being converted to heat.
(Friction; means; the energy of the airflow is being converted to heat) Context(Friction means,List([0, 14))):(the energy of the airflow; is being converted; to heat)
Friction means,List([0, 14))
Friction the energy of the airflow
means is being converted
the energy of the airflow is being converted to heat
to heat