<s>
There	O
are	O
various	O
definitions	O
of	O
autonomous	B-General_Concept
agent	I-General_Concept
.	O
</s>
<s>
(	O
2015	O
)	O
post	O
safety	O
issue	O
from	O
how	O
the	O
combination	O
of	O
external	O
appearance	O
and	O
internal	O
autonomous	B-General_Concept
agent	I-General_Concept
have	O
impact	O
on	O
human	O
reaction	O
about	O
autonomous	O
vehicles	O
.	O
</s>
