With no explanation, label each line with "location-GPE", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
His
mother
was
the
eldest
daughter
of
Robert
of
Beaumont
,
3rd
Earl
of
Leicester
.
His:O
mother:O
was:O
the:O
eldest:O
daughter:O
of:O
Robert:person-politician
of:person-politician
Beaumont:person-politician
,:O
3rd:O
Earl:O
of:O
Leicester:location-GPE
.:O