<human>: Q: What is the earliest that they kept live bears in the Bärengraben?
 A: As a result of the find of the Bern zinc tablet in the 1980s, it is now more common to assume that the city was named after a pre-existing toponym of Celtic origin, possibly *berna "cleft".
 Does the answer correctly answer the question

OPTIONS:
- yes
- no
<bot>: no