How to make the bot react to messages inside the text?

Question

Python

Hello, I ran into such a problem: I have a telegram bot that responds to messages and sends a text.
And it can only respond to a message with one given word, like

if message.text.lower() == "ясно":
await bot.send_message(message.chat.id, "погода ясная")

And here is the question, how to make the bot pull the word "clear" out of context, for example, "it was clear today on the street, right?"
and answered the same

await bot.send_message(message.chat.id, "погода ясная")

Help me please)

Answer 1

if "ясно" in message.text.lower():
    ...