There are three set of images, for each set please determine a word/phrase representing it, and determine the final word by the three words/phrases. (A set can have any amount of images.)
Ok, you probably won't need to think for set three, but in set one, you have to think for a while, and for set two and final word, you have to have some knowledge.
The answer to set three is "f___ m___", in case you want to check.
Tips 1 (50 viewers)
The answer to set one is "S_____".
Tips 2 (100 viewers)
The answer to set one is "Sun___".
Tips 3 (200 viewers)
Look at set 1, the image is a sun in a day.