Then in 1971 an investigator decided to try preparing a low-temperature extract of the plant with an organic solvent.
(an investigator; decided; to try preparing a low-temperature extract of the plant with an organic solvent; T:Then; T:in 1971) Context(an investigator decided,List([13, 36))):(an investigator; decided to try; preparing a low-temperature extract of the plant with an organic solvent) Context(an investigator decided to try,List([13, 43))):(an investigator; decided to try preparing; a low-temperature extract of the plant with an organic solvent)
an investigator decided,List([13, 36)) an investigator decided to try,List([13, 43))
an investigator an investigator an investigator
decided decided to try decided to try preparing
to try preparing a low-temperature extract of the plant with an organic solvent T:Then T:in 1971
preparing a low-temperature extract of the plant with an organic solvent
a low-temperature extract of the plant with an organic solvent