Why exactly has this image been rejected?

[#1]

I took this image on my own camera. It’s simply a boat on a local river. Yeti get this back.

i quote.

Thanks for giving us the chance to consider your image.

During our review, we found that it contains elements that appear to be protected by intellectual property laws, so we can't accept it into our collection. Please review the following intellectual property rights guidelines:

I mean, really. How difficult is this? Can anyone tell me what I need to do?

[#2]

Moving to Stock Contributor Critique​

[#3 · Accepted solution]

Clone out the identifiable marks on the sail and boat! That's why it got refused.