With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Between
May
2013
and
October
2015
,
he
worked
at
Salesforce.com
.
Between:O
May:O
2013:O
and:O
October:O
2015:O
,:O
he:O
worked:O
at:O
Salesforce.com:O
.:O