INSTANCE optional_xor_empty_aggregation#3; extracted_from = {explicit_attribute#300}; corresponds_to = {correspondence#37}; attribute = explicit_attribute#300; END_INSTANCE;
INSTANCE optional_xor_empty_aggregation#4; extracted_from = {explicit_attribute#314}; corresponds_to = {correspondence#37}; attribute = explicit_attribute#314; END_INSTANCE;