I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: Police Story 3: Super Cop Movie plot: Ka-Kui is the "supercop" of the Hong Kong police, with amazing martial arts skills. He is sent to Guangzhou, where the Chinese police force's Interpol director, Inspector Jessica Yang (Michelle Yeoh), briefs him on his next assignment. The target is Chaibat, a drug lord based in Hong Kong. To infiltrate Chaibat's organization, Ka-Kui is to get close to Chaibat's henchman Panther, who is in a Chinese prison. Ka-Kui, posing as a petty criminal prisoner, manages Panther's escape with the connivance of the guards. Grateful Panther invites Ka-Kui to go with him to Hong Kong and join Chaibat's gang. Panther meets up with some of his other men, and vouches for Ka-Kui. The group heads for Hong Kong. On the way, they pass through Ka-Kui's supposed home village, and Panther insists that Ka-Kui visit his family there. He does not actually know anyone in the village, but is pleasantly relieved to be greeted by undercover police posing as his family, with Yang as his sister. The local police pretend to arrest Ka-Kui in a restaurant, but Ka-Kui and Yang (also a martial-arts expert) escape after a big fight, which concludes with the faked killing of a policeman. This confirms Panther's trust in them. In Hong Kong, Chaibat welcomes Ka-Kui and Yang to his luxurious hide-out. He takes them with him to a big opium grower's fortified compound in the Golden Triangle of Thailand, for a meeting of big-time heroin traffickers. During the meeting, Chaibat's gang attack from outside while Ka-Kui and Yang protect him inside. In a huge gun battle, Chaibat's gang kill the rival traffickers and their guards, and smash up the compound. The grower survives, but will now sell only to Chaibat at Chaibat's price. The action then shifts to Kuala Lumpur, Malaysia, where Chaibat's wife, Chen Wen-Shi, is in prison, facing the death penalty for an unspecified crime. Chaibat needs to get her out of prison, because only she knows the secret codes to his Swiss bank account, and will not reveal them to him unless freed. Chaibat brings his gang, now... My question: What is Jessica Yang's profession?
A:
doctor