find the id, name and age for visitors who visited some museums more than once.
SELECT t1.id ,  t1.name ,  t1.age FROM visitor AS t1 JOIN visit AS t2 ON t1.id  =  t2.visitor_id GROUP BY t1.id HAVING count(*)  >  1
SELECT t1.id ,  t1.name ,  t1.age FROM visitor AS t1 JOIN visit AS t2 ON t1.id  =  t2.visitor_id GROUP BY t1.id HAVING count(*)  >  1
[{'ID': 3, 'Name': 'Arjen Robben', 'Age': 27}, {'ID': 5, 'Name': 'Fernando Gago', 'Age': 36}, {'ID': 6, 'Name': 'Rafael van der Vaart', 'Age': 25}]