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interesting observation. I said it's not about the seagull in the second paragraph. what do you think is the meaning of the boat?

For me it's loneliness, also I can see that boat might mean a great plans for the future that awaiting someone... I'm more pessimistic so i can see more loneliness, alone like this boat, and seagul that passing by means some event in my life that doesn't hold in it for a long time

I like your meaning. To me is much brighter than that but that's what art is for! Each of us can feel and think about it slightly different. :-)