With no explanation, label each line with "O", "person-scholar", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
From
1922
to
1925
,
Gehrcke
was
also
a
member
of
the
``
Kuratorium
``
(
board
of
trustees
)
of
the
Potsdam
Astrophysical
Observatory
.
From:O
1922:O
to:O
1925:O
,:O
Gehrcke:person-scholar
was:O
also:O
a:O
member:O
of:O
the:O
``:O
Kuratorium:organization-other
``:O
(:O
board:O
of:O
trustees:O
):O
of:O
the:O
Potsdam:organization-other
Astrophysical:organization-other
Observatory:organization-other
.:O