Anne is big. Anne is quiet. Anne is round. Anne is not white. Anne is young. Charlie is green. Charlie is quiet. Charlie is young. Dave is green. Dave is white. Fiona is big. Fiona is blue. Fiona is green. Fiona is quiet. Fiona is white. Fiona is young. All white, round things are not blue. Green things are not round. All big, green things are blue. If something is green then it is quiet. If something is blue and not round then it is big. If something is round then it is blue. All round things are blue. Quiet, round things are not green.
Dave is young.