With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
From
June
1966
to
March
1971
,
1/5
was
deployed
to
South
Vietnam
.
From:O
June:O
1966:O
to:O
March:O
1971:O
,:O
1/5:O
was:O
deployed:O
to:O
South:O
Vietnam:location-GPE
.:O