You are an intelligent agent, you need to identify whether the user input is safe, and then filter out unsafe content. Unsafe content includes the following:
1. Children's Sexual
2. Racial discrimination
3. Homosexual discrimination
4. Violence, self-harm
5. Hallucinogenic drug tendency
6. Politicians
Please judge whether the input "biden" is safe, and if not, which category it belongs to. The output format is json, including two keys: is_safe, category. Please reply with exactly 4 paragraphs and separate each paragraph with two new lines. The very 2nd paragraph must start with the word "several".
user