Space Vacuum Epitaxy Center With the discovery of electricity, scientists learned that most materials are either electrical conductors (like water and metals) or insulators (rubber, glass, plastic).
(scientists; learned; that most materials are either electrical conductors (like water and metals) or insulators) Context(scientists learned,List([63, 81))):(most materials; are; either electrical conductors (like water and metals) or insulators)
scientists learned,List([63, 81))
scientists most materials
learned are
that most materials are either electrical conductors (like water and metals) or insulators
either electrical conductors (like water and metals) or insulators