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 ":".
By
means
of
a
powder
charge
it
propelled
a
variant
of
the
jam
tin
grenade
.
By:O
means:O
of:O
a:O
powder:O
charge:O
it:O
propelled:O
a:O
variant:O
of:O
the:O
jam:O
tin:O
grenade:O
.:O