Write a query in SQL to find the name of the nurse who are the head of their department.
Sample table: nurse
employeeid | name | position | registered | ssn
------------+-----------------+------------+------------+-----------
101 | Carla Espinosa | Head Nurse | t | 111111110
102 | Laverne Roberts | Nurse | t | 222222220
103 | Paul Flowers | Nurse | f | 333333330
Sample Output:
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