With no explanation, label each line with "O", "person-athlete", "organization-sportsleague", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
August
15
,
2020
,
Schrock
’
s
contract
was
selected
to
MLB
roster
.
On:O
August:O
15:O
,:O
2020:O
,:O
Schrock:person-athlete
’:O
s:O
contract:O
was:O
selected:O
to:O
MLB:organization-sportsleague
roster:O
.:O