context: Oil (from Turkish: neft, from Persian: نفت, naft [1]) is a natural oily combustible liquid with a specific odor, consisting mainly of a complex mixture of hydrocarbons of various molecular weights and some other chemical compounds. Refers to caustobioliths [2] (fossil fuels [3]).
question: What does oil consist of?
answers.text: a complex mixture of hydrocarbons of various molecular weights and some other chemical compounds