With no explanation, label each line with "O", "other-chemicalthing", "person-scholar", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Because
of
its
position
in
his
periodic
table
,
Mendeleev
called
it
``
ekasilicon
(
Es
)
``
,
and
he
estimated
its
atomic
weight
to
be
70
(
later
72
)
.
Because:O
of:O
its:O
position:O
in:O
his:O
periodic:O
table:O
,:O
Mendeleev:person-scholar
called:O
it:O
``:O
ekasilicon:other-chemicalthing
(:other-chemicalthing
Es:other-chemicalthing
):other-chemicalthing
``:O
,:O
and:O
he:O
estimated:O
its:O
atomic:O
weight:O
to:O
be:O
70:O
(:O
later:O
72:O
):O
.:O