Anchor: alrighty uh i guess our topic today is air pollution and we are to just discuss what substances do you think contribute most to air pollution as well as what society can do to improve the air quality of the atmosphere around us
Entailed: Our topic is air pollution: what substances do you think contribute the most to it, and what can society do to improve air quality?
Contradiction: Do you feel that you've ever been affected negatively by polluted air?
Contradiction: humans are playing by the fire
Contradiction: A person is sitting and perhaps trying to sell something.
Contradiction: Here there are no apothecaries because everything has changed. 
Contradiction: There are people riding bycicles.