Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

Example Input: I need a single-word to describe something good that (unexpectedly) resulted from something bad. This good thing could not have occurred without the bad event happening first, as a precursor. Example sentence: 'I got in a horrible car accident and broke my leg, but falling in love with my nurse at the hospital was the ____,' (something like that).
Example Output: silver lining 'I got in a horrible car accident and broke my leg, but falling in love with my nurse at the hospital was the silver lining' From Wikipedia A silver lining is a metaphor for optimism in the common English-language which means a negative occurrence may have a positive aspect to it. Etymonline says: a 'bright side' which proverbially accompanies even the darkest trouble; by 1843, apparently from oft-quoted lines from Milton's 'Comus,' where the silver lining is the light of the moon shining from behind the cloud. Was I deceived? or did a sable cloud Turn forth her silver lining on the night? I did not err, there does a sable cloud, Turn out her silver lining on the night And casts a gleam over this tufted grove. To which Thomas Warton added the commentary: 'When all succour eems to be lost, Heaven unexpectedly presents the ilver lining o a able cloud to the virtuous.'

Example Input: This is a question for English wordsmiths. Is there a word that 'feels' like the word 'ethereal' that means something ethereal that quickly disappears. Or is 'ethereal' the correct word choice for this? Ethereal was the first word that popped into my head for this. From the various definitions that I've looked at for ethereal, it says delicate, beautiful, heavenly, etc. but not necessarily quickly vanishing, except for the secondary definitions related to ether that suggests it evaporates. I'm just wondering if there is a better word than this. I'm using the term 'ethereal skill' to describe a certain type of pilot skill (instrument flying) that requires tremendous practice to achieve proficiency, and once proficiency is achieved it is a beautiful thing, but if you don't practice it regularly, that skill vanishes after a few weeks. USAGE: Instrument proficiency is an ethereal skill that once obtained must be maintained through constant and regular practice.
Example Output: You are probably looking for the word ephemeral. ephemeral: Lasting for a very short time.

Example Input: If a possessive noun, which is plural, is preceded by 'each', then should it use the singular or plural possessive form? For example, which of the following is correct? spend time in each other's presence spend time in each others' presence.
Example Output:
Each other is singular, so the correct possessive is each other's. Edit: I found some controversy on this on the web because each other implies that there are multiple people involved, hence people think it is plural and should be written each others'. This, however, is wrong as each is always singular.

