<s>
Sonar	B-Application
was	O
a	O
free	O
mobile	B-Application
application	I-Application
which	O
showed	O
the	O
user	O
how	O
they	O
are	O
connected	O
to	O
other	O
individuals	O
in	O
a	O
room	O
via	O
publicly	O
available	O
social	O
media	O
profiles	O
and	O
location	O
information	O
from	O
Foursquare	B-Application
,	O
Twitter	B-Application
,	O
and	O
Facebook	B-Application
.	I-Application
</s>
<s>
Sonar	B-Application
was	O
founded	O
by	O
Ocean	O
City	O
,	O
Maryland	O
,	O
native	O
Brett	O
Martin	O
,	O
and	O
was	O
launched	O
in	O
2011	O
at	O
TechCrunch	O
Disrupt	O
New	O
York	O
.	O
</s>
<s>
Sonar	B-Application
is	O
the	O
fourth	O
business	O
to	O
come	O
out	O
of	O
New	O
York-based	O
mobile	O
incubator	O
K2	O
Media	O
Labs	O
,	O
with	O
the	O
previous	O
three	O
being	O
Fingerprint	O
,	O
Tracks	O
,	O
and	O
MarketSharing	O
.	O
</s>
<s>
Sonar	B-Application
has	O
been	O
offline	O
as	O
of	O
September	O
2013	O
,	O
at	O
which	O
time	O
Martin	O
stated	O
that	O
he	O
was	O
no	O
longer	O
working	O
on	O
the	O
project	O
.	O
</s>
