With no explanation, label each line with "O", "product-software", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
uses
and
extends
the
Java
Servlet
API
to
encourage
developers
to
adopt
a
model–view–controller
(
MVC
)
architecture
.
It:O
uses:O
and:O
extends:O
the:O
Java:product-software
Servlet:product-software
API:product-software
to:O
encourage:O
developers:O
to:O
adopt:O
a:O
model–view–controller:O
(:O
MVC:O
):O
architecture:O
.:O