Are there any open-source text annotation for multi label classification tools? I have a large texts in each document and I want to know if there are any open source text annotation tools available online for multiple label annotation.

Each sentence takes two labels. If there are any please let me know.
There are many manual text annotation tools available, but you will probably have to search around in order to find the one which suits your precise needs.
Here are a few pointers:

Gate
Text annotation tools
Doccano
a recent review