the Contexts are a list with the following schema: "[service,[table,description][column,description]...]" , write an sql query to get all PR with "blabla" in the message
Contexts: ['github', ['search_pull_request', 'Find pull requests by state and keyword.', [['title', 'The title of the pull request.'], ['id', 'The ID of the pull request.'], ['query', 'The query used to match the pull request.'], ['state', 'The state of the pull request.'], ['active_lock_reason', 'The active lock reason of the pull request.'], ['author_association', 'The author association of the pull request.'], ['body', 'The body of the pull request.'], ['closed_at', 'The timestamp the pull request closed at.'], ['comments', 'The number of comments on the pull request.'], ['comments_url', 'The API URL of the comments for the pull request.'], ['created_at', 'The timestamp the pull request created at.'], ['events_url', 'The API URL of the events for the pull request.'], ['html_url', 'The complete URL of the pull request.'], ['labels_url', 'The API URL of the labels for the pull request.'], ['locked', 'Whether the pull request is locked.'], ['node_id', 'The node ID of the pull request.'], ['number', 'The number of the pull request.'], ['repository_url', 'The API URL of the repository for the pull request.'], ['repository_full_name', 'The full name of the repository (login/repo-name).'], ['updated_at', 'The timestamp the pull request updated at.'], ['url', 'The API URL of the pull request.'], ['assignee', 'The assignee details.'], ['assignees', 'The assignees details.']]]]; Answer: