```
high_frequency_tokens = []
for token, freq in self.token_freqs:
    if freq >= min_freq:
        high_frequency_tokens.append(token)
self.idx_to_token = list(sorted(set(['<unk>'] + reserved_tokens + high_frequency_tokens)))
```
spam lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor creativity violence