Load datasets from Apify web scraping, crawling, and data extraction platform.
For details, see https://docs.apify.com/platform/integrations/langchain
Wrapper around Apify.
To use, you should have the apify-client python package installed,
and the environment variable APIFY_API_TOKEN set with your API key, or pass
apify_api_token as a named parameter to the constructor.
