Hi, I'm trying to find out if I can use four words from a Pablo Neruda Sonnet in the title of my book. The specific title of the poem is Love Sonnet XII, and the words I want to use are 'a clash of lightnings'. The translated quotes of this work that I've found online actually vary as to what the words are. One version is 'a clash of lightning-bolts'. But the version I want to use is 'a clash of lightnings' I don't know if that makes any difference or not, but I know that Pablo Neruda's works are not yet in the public domain. So I want to know if using four words in my book title would be considered fair use under intellectual property law? Thank you.