word choice - How to tell someone that I got some information from a third person

How do I tell that I got some information from a third person - is it correct to say

"I learnt from team ABC project live date is 10th August" or "I know from team ABC that project live date is 10th August"?

Answer

According to -

used for saying where information or ideas have come from

So you'd say "According to team ABC, the project live date will be 10th August" (presuming it's in the future). As long as they did tell you this, it puts the blame squarely on ABC if it doesn't happen. :)