Solve the following sql problem:
What is the most cited word? How many papers was that word cited in?

Schema:
SCHEMA:
- Table: cites
  - Column: cited_paper_id
    - Samples: [100157, 100157, 100157, 100157, 100157]
  - Column: citing_paper_id
    - Samples: [100157, 364207, 38848, bradshaw97introduction, bylund99coordinating]
- Table: paper
  - Column: paper_id
    - Samples: [100157, 100598, 101570, 10227, 102637]
  - Column: class_label
    - Samples: [Agents, IR, ML, ML, AI]
- Table: content
  - Column: paper_id
    - Samples: [100157, 100157, 100157, 100157, 100157]
  - Column: word_cited_id
    - Samples: [word1163, word1509, word1614, word1642, word1663]

SELECT word_cited_id, COUNT(paper_id) FROM content GROUP BY word_cited_id ORDER BY COUNT(word_cited_id) DESC LIMIT 1