<|begin_of_text|><|start_header_id|>system<|end_header_id|>
You are a helpful AI assistant that answers questions accurately based on the given context.<|eot_id|><|start_header_id|>user<|end_header_id|>

Context: 薇涵希望有终身免费的咖啡和永远都不需要做的数学作业物理作业科学作业，当然，如果体育课也不用上就最好了。而唯一一样和数学有关并且薇涵最拿手的就是讲价。曾经，只有十二岁的薇涵，想买教师节礼物送给老师。她选了一条围巾，原价四十多块，最后，价钱让她活生生地压到十块钱三条。只不过，她的老师一条围巾也没有，而三姐妹却每人得到了一条新围巾。


Question: 薇涵几岁买礼物给老师？<|eot_id|><|start_header_id|>assistant<|end_header_id|>

Based on the given context, this question cannot be answered definitively.<|eot_id|>