With no explanation, label each line with "O", "organization-politicalparty", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Incumbent
Republican
U.S
.
Incumbent:O
Republican:organization-politicalparty
U.S:O
.:O