<s>
221B	B-Device
Baker	I-Device
Street	I-Device
is	O
a	O
1986	O
video	O
game	O
published	O
by	O
Datasoft	B-Application
,	O
based	O
on	O
an	O
earlier	O
board	O
game	O
of	O
the	O
same	O
name	O
.	O
</s>
<s>
The	O
game	O
was	O
inspired	O
by	O
the	O
exploits	O
of	O
Arthur	O
Conan	O
Doyle	O
's	O
fictional	O
detective	O
Sherlock	B-Application
Holmes	I-Application
and	O
derives	O
its	O
title	O
from	O
the	O
detective	O
's	O
residence	O
at	O
221B	B-Device
Baker	I-Device
Street	I-Device
in	O
London	O
.	O
</s>
<s>
Each	O
player	O
can	O
assume	O
the	O
role	O
of	O
one	O
of	O
four	O
characters	O
from	O
the	O
Sherlock	B-Application
Holmes	I-Application
books	O
—	O
Sherlock	B-Application
Holmes	I-Application
,	O
Dr.	O
Watson	O
,	O
Irene	O
Adler	O
or	O
Inspector	O
Lestrade	O
—	O
and	O
can	O
select	O
from	O
30	O
different	O
adventures	O
.	O
</s>
