With no explanation, label each line with "location-GPE", "O", "person-scholar", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Klein
introduced
her
to
Wilhelm
Dörpfeld
who
invited
her
to
participate
in
his
archaeological
tours
in
Greece
.
Klein:person-scholar
introduced:O
her:O
to:O
Wilhelm:person-scholar
Dörpfeld:person-scholar
who:O
invited:O
her:O
to:O
participate:O
in:O
his:O
archaeological:O
tours:O
in:O
Greece:location-GPE
.:O