Database: aan_1
Question: What is the name and number of citations of the author with the greatest number of citations among authors?
SQL:
SELECT T3.name ,  count(*) FROM Citation AS T1 JOIN Author_list AS T2 ON T1.cited_paper_id  =  T2.paper_id JOIN Author AS T3 ON T2.author_id  =  T3.author_id GROUP BY T2.author_id ORDER BY count(*) DESC LIMIT 1