With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
is
the
eldest
child
of
Prince
Alois
and
his
wife
Duchess
Sophie
in
Bavaria
.
He:O
is:O
the:O
eldest:O
child:O
of:O
Prince:O
Alois:person-other
and:O
his:O
wife:O
Duchess:person-other
Sophie:person-other
in:O
Bavaria:location-GPE
.:O