Union Perg VS Ostermiething

{"lg_-1":[0,0,0,0],"lg_-1_6":[0,0,0,0]}

{"lg_-1":[4,3,6,13],"lg_-1_6":[2,0,4,6],"lg_712":[4,3,6,13],"lg_712_6":[2,null,4,6]}

{"lg_-1":[4,2,7,13],"lg_-1_6":[2,0,4,6],"lg_712":[4,2,7,13],"lg_712_6":[2,null,4,6]}

{"lg_-1":[3,1,2,6],"lg_-1_6":[3,1,2,6],"lg_712":[3,1,2,6],"lg_712_6":[3,1,2,6]}

{"lg_-1":[3,0,3,6],"lg_-1_6":[3,0,3,6],"lg_712":[3,null,3,6],"lg_712_6":[3,null,3,6]}