{"subshape": {"value": "arrow", "label": "arrow"}, "shape": {"value": "cospan", "label": "cospan"}}
{"subshape": {"value": "arrow", "label": "arrow"}, "shape": {"value": "endomorphism", "label": "endomorphism"}}
{"subshape": {"value": "arrow", "label": "arrow"}, "shape": {"value": "pair of parallel arrows", "label": "pair of parallel arrows"}}
{"subshape": {"value": "arrow", "label": "arrow"}, "shape": {"value": "span", "label": "span"}}
{"subshape": {"value": "arrow", "label": "arrow"}, "shape": {"value": "tower", "label": "tower"}}
{"subshape": {"value": "empty diagram", "label": "empty diagram"}, "shape": {"value": "point", "label": "point"}}
{"subshape": {"value": "pair of points", "label": "pair of points"}, "shape": {"value": "arrow", "label": "arrow"}}
{"subshape": {"value": "point", "label": "point"}, "shape": {"value": "pair of points", "label": "pair of points"}}
{"subshape": {"value": "tower", "label": "tower"}, "shape": {"value": "transfinite composition", "label": "transfinite composition"}}