With no explanation, label each line with "product-game", "O", "product-software", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Two
expansion
packs
were
released
for
``
Heroes
IV
``
:
Heroes
of
Might
and
Magic
IV
:
The
Gathering
Storm
(
2002
)
and
Heroes
of
Might
and
Magic
IV
:
Winds
of
War
(
2003
)
,
both
for
Microsoft
Windows
only
.
Two:O
expansion:O
packs:O
were:O
released:O
for:O
``:O
Heroes:product-game
IV:product-game
``:O
::O
Heroes:product-game
of:product-game
Might:product-game
and:product-game
Magic:product-game
IV:product-game
::O
The:O
Gathering:product-game
Storm:product-game
(:product-game
2002:product-game
):product-game
and:O
Heroes:product-game
of:product-game
Might:product-game
and:O
Magic:product-game
IV:product-game
::O
Winds:product-game
of:product-game
War:product-game
(:product-game
2003:product-game
):product-game
,:O
both:O
for:O
Microsoft:product-software
Windows:product-software
only:O
.:O