<s>
A	O
radioisotope	B-Algorithm
piezoelectric	I-Algorithm
generator	I-Algorithm
(	O
RPG	O
)	O
is	O
a	O
type	O
of	O
radioisotope	B-Application
generator	I-Application
that	O
converts	O
energy	O
stored	O
in	O
radioactive	O
materials	O
into	O
motion	O
,	O
which	O
is	O
used	O
to	O
generate	O
electricity	O
using	O
the	O
repeated	O
deformation	O
of	O
a	O
piezoelectric	O
material	O
.	O
</s>
