text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_name_93 (category VARCHAR, year VARCHAR, competition VARCHAR)
  ### Question:
  What are the categories of events that occurred after 2007 that were World Championships?
  ### Answer:
  SELECT category FROM table_name_93 WHERE year > 2007 AND competition = "world championships"