Original sentence: According to one disputed account, two other exceptional students began studying under the same teacher at about the same time.As it was mentioned, this story, known as Three Schoolmates is questionable because the date of birth of these three schoolmates don't match
Edited sentence: According to a highly doubtful story, two other exceptional students began studying under the same teacher at about the same time.As it was mentioned, this story, known as Three Schoolmates is doubtful because the date of birth of these three schoolmates don't match