<s>
The	O
general	O
idea	O
is	O
similar	O
to	O
the	O
Even-Paz	B-Algorithm
protocol	I-Algorithm
:	O
:	O
</s>
<s>
Their	O
algorithm	O
requires	O
queries	O
in	O
the	O
Robertson	B-Application
–	I-Application
Webb	I-Application
query	I-Application
model	I-Application
;	O
thus	O
it	O
is	O
more	O
efficient	O
than	O
agent-cloning	O
and	O
cut-near-halves	O
.	O
</s>
