Why is 教 pronounced as 1st tone here? 你认识教水墨画的老师吗？
I have just seen a learn Chinese video where they teach the sentence 你认识教水墨画的老师吗？
They teach 教 here as 1st tone, not 4th tone. Why? I thought 教 was 4th tone? When and why do you say it with a 1st tone?