He also helped improve the telescope, microscope, headlights and spotlights.
(He; helped; improve the telescope, microscope, headlights and spotlights) Context(He helped,List([0, 14))):(He; helped improve; the telescope, microscope, headlights and spotlights)
He helped,List([0, 14))
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helped helped improve
improve the telescope, microscope, headlights and spotlights
the telescope, microscope, headlights and spotlights