{"category": {"value": "SSet", "label": "SSet"}, "construction": {"value": "binary product", "label": "binary product"}}
{"category": {"value": "SSet", "label": "SSet"}, "construction": {"value": "initial object", "label": "initial object"}}
{"category": {"value": "SSet", "label": "SSet"}, "construction": {"value": "terminal object", "label": "terminal object"}}