how could I add text chat to live videos while all text be at the correct frame of video without delay for all viewers?

Hi

I want to know , how to add txt chat (comment) to live streaming that guarantees when some one comment in a frame x , all viewers watch that comment when the frame x is playing for them. I mean I don’t want the txt and video be separate. I want to send related text chat in correct time of the live video. Do you know how wowza could help me?