It can be seen by rubbing hard rubber or glass until they get hot, then they will attract sand, iron filings, salt, and other things.
(It; by rubbing; hard rubber) (they; get; hot) (they; will attract; sand; T:then) Context(they will attract,List([72, 89))):(It; can be seen; by rubbing hard rubber or glass; T:until they get hot, then they will attract sand, iron filings, salt, and other things)
they will attract,List([72, 89))
It they they It
by rubbing get will attract can be seen
hard rubber
hot
sand T:then
by rubbing hard rubber or glass T:until they get hot, then they will attract sand, iron filings, salt, and other things