Assertion: stinger | /r/HasProperty | upgraded with new lithium polymer batteries
Facets:
value: in 2019
type: TEMPORAL
value: to keep it
type: PURPOSE
Source sentences:
text: In 2019, Stinger was upgraded with new lithium polymer batteries to keep it up to date with the competing robots of today and had been given a polish and new paint job to make it look as good as new for the 2019 line of robot combat events.