which scientist is known for the organoaluminium chemistry and the ziegler–natta catalyst ?
select distinct var_uri where brack_open var_uri dbo_knownFor dbr_Organoaluminium_chemistry sep_dot var_uri rdf_type dbo_Scientist sep_dot var_uri dbo_knownFor dbr_Ziegler–Natta_catalyst sep_dot brack_close