With no explanation, label each line with "O", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
visited
Mount
Vesuvius
during
an
eruption
,
and
reported
his
observations
back
to
several
scientific
bodies
.
He:O
visited:O
Mount:location-mountain
Vesuvius:location-mountain
during:O
an:O
eruption:O
,:O
and:O
reported:O
his:O
observations:O
back:O
to:O
several:O
scientific:O
bodies:O
.:O