Assertion: thunderbolt | /r/HasProperty | one of the heaviest mechs
Facets:
Source sentences:
text: The Thunderbolt started production in 2491 as a planetary-assault 'Mech, and in fact was one of the heaviest 'Mechs capable of being produced at that time.
text: The Thunderbolt started production in 2491 as a planetary-assault 'Mech, and in fact was one of the heaviest 'Mechs capable of being produced at that time.