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 ":".
Gerhart
Eisler
(
20
February
1897
–
21
March
1968
)
was
a
German
politician
.
Gerhart:person-politician
Eisler:person-politician
(:O
20:O
February:O
1897:O
–:O
21:O
March:O
1968:O
):O
was:O
a:O
German:location-GPE
politician:O
.:O