PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
2023255-1	1991	Human liver manganese superoxide dismutase has been purified by a short procedure that includes a tri-phase partitioning step to provide materials that can be crystallized from ammonium sulfate.	Ammonium Sulfate	177-193	superoxide dismutase 2	Homo sapiens	12-42