Add punctuation to the following sentence:  After my initial fieldwork shifted toward fishing I have begun writing a paper on the highly adaptive scallop knife which is constantly reshaped to reduce aches and pains in the body and as a result of the changing sizes of the scallops dredged south of Nuuk


– After my initial fieldwork shifted toward fishing, I have begun writing a paper on the highly adaptive scallop knife, which is constantly reshaped to reduce aches and pains in the body and as a result of the changing sizes of the scallops dredged south of Nuuk.