With no explanation, label each line with "O", "other-currency", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
This
legislation
required
the
Treasury
to
purchase
millions
of
dollars
'
worth
of
silver
bullion
each
month
,
and
coin
it
into
silver
dollars—the
denomination
was
restored
as
a
legal
tender
,
except
when
gold
was
specified
by
law
or
private
contract
.
This:O
legislation:O
required:O
the:O
Treasury:organization-government/governmentagency
to:O
purchase:O
millions:O
of:O
dollars:other-currency
':O
worth:O
of:O
silver:O
bullion:O
each:O
month:O
,:O
and:O
coin:O
it:O
into:O
silver:O
dollars—the:O
denomination:O
was:O
restored:O
as:O
a:O
legal:O
tender:O
,:O
except:O
when:O
gold:O
was:O
specified:O
by:O
law:O
or:O
private:O
contract:O
.:O