context: Anne is not Erin's husband. If Erin is not the grandfather of Fiona then Fiona is not blue. If Harry is not red then Gary is not Charlie's son. If Fiona is rough then The son of Charlie is Gary. Fiona is young if The grandfather of Fiona is not Erin. If The daughter of Harry is Bob then Fiona is not young. Charlie is Dave's sister if The son of Charlie is not Gary. If Erin is not Fiona's grandfather then Dave is Fiona's mother. If Fiona is rough then Charlie is not Dave's sister. The mother of Fiona is not Dave if The sister of Dave is Charlie. Harry is red if Fiona is rough. Erin is the son of Harry if Fiona is rough. Erin is not the grandfather of Fiona if Fiona is rough. Bob is the daughter of Harry if Fiona is blue. If Anne is not Erin's husband then The son of Harry is not Erin. If Erin is not the grandfather of Fiona then The daughter of Harry is not Bob. The daughter of Dave is not Charlie if The son of Harry is not Erin. If The son of Charlie is not Gary then Fiona is blue. If Fiona is rough then Charlie is Dave's daughter. If Anne is Erin's husband then Harry is not red.