Expression 5: polygon left parenthesis, left parenthesis, 0 , negative 1 , right parenthesis , left parenthesis, 0 , 0 , right parenthesis , right parenthesispolygon0,−1,0,0
5
Hidden Label: left parenthesis, 0 , negative 1 , right parenthesis0,−1
Label
6
Hidden Label: left parenthesis, 0 , 0 , right parenthesis0,0