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.

Ex Input:
But I am unsure, if I should write 'on' or 'at'. May anybody help me with that?.

Ex Output:
'At url' would be the idiomatic way to say this. For these sorts of questions google ngram is your friend. There you see that the usage of 'at' occurs and 'on' does not. One of the commenters is correct though, when you are talking about a web site by name rather than by url you can say either 'at StackOverflow' or 'on StackOverflow' but the latter is more common. Again, using 'cnn.com' as an example, google ngram votes clearly for 'on' but certainly allows for 'at'.


Ex Input:
In computer programming, when you append a 'string' to another, you add it to the end of the former string. E.g. String string1 = 'abcd'; String string2 = 'efgh'; Appending the two strings would give 'abcdefgh' But what if I wanted to add string2 before string1 to have the result: 'efghabcd' What would be a good name for that that reverse operation? What is the opposite of 'append'?.

Ex Output:
Prepend: (computing, linguistics, transitive) To attach (an expression, phrase, etc.) to another, as a prefix.


Ex Input:
I am looking for the term describing when your hair grows kind of in a circular direction (defined by the direction of your hair root). Many people have something like this on the back of their heads or even on their foreheads. I found the term hair crown on dict.cc but I feel like this is either not the correct term for it or it is not very widely used. There is a German article on human hair including a section about these things but I could not find the English equivalent. In German, these are called Haarwirbel meaning something like hair whirl.

Ex Output:

You probably want to use hair whorl. You'll notice that it's virtually the same as the German term, except with the alternate spelling of whorl/whirl. In English, whirl is the verb form, whorl is the noun.