With no explanation, label each line with "location-GPE", "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Brian
Boru
began
his
three-year-old
season
in
the
Derrinstown
Stud
Derby
Trial
at
Leopardstown
on
11
May
in
which
he
finished
third
behind
Alamshar
and
The
Great
Gatsby
.
Brian:person-athlete
Boru:person-athlete
began:O
his:O
three-year-old:O
season:O
in:O
the:O
Derrinstown:location-GPE
Stud:location-GPE
Derby:location-GPE
Trial:location-GPE
at:O
Leopardstown:location-GPE
on:O
11:O
May:O
in:O
which:O
he:O
finished:O
third:O
behind:O
Alamshar:person-athlete
and:O
The:person-athlete
Great:person-athlete
Gatsby:person-athlete
.:O