<s>
Tail	B-Application
'	I-Application
Gator	I-Application
,	O
known	O
in	O
Japan	O
as	O
,	O
is	O
a	O
Game	B-Device
Boy	I-Device
video	O
game	O
released	O
in	O
1991	O
.	O
</s>
<s>
There	O
are	O
five	O
areas	O
in	O
Tail	B-Application
'	I-Application
Gator	I-Application
;	O
the	O
first	O
three	O
are	O
divided	O
into	O
four	O
sections	O
revolving	O
around	O
recurring	O
themes	O
:	O
Air	O
,	O
land	O
,	O
cave	O
,	O
and	O
underwater	O
.	O
</s>
