For all entities assigned to given person (that have at least one task assigned to given person), returns all tasks for given task type.

GET /data/persons/{person_id}/related-tasks/{task_type_id}
GET /data/persons/{person_id}/related-tasks/{task_type_id} 
curl \
 -X GET http://api.example.com/data/persons/{person_id}/related-tasks/{task_type_id}