Any person who unlawfully sets fire to any building, erection, or structure whatever, whether the same is completed or not, or to any stack or heap of cultivated vegetable produce, or of timber, or of mineral or vegetable fuel, or to any mine, or to any ship or vessel, completed or not, is guilty of a crime, which is called arson.

(a) Damage of property
(b) That it was damaged by fire
(c) That the property belonged, if only in part, to another

(a) Duress

(b) Factual dispute

(c) Identification dispute

(d) Lack of intent

(e) Mental impairment