Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.

Input: Consider Input: Question: Possible Duplicate: What is the difference between an expression and a phrase? Difference between "phrase" and "idiom" What is the difference between a phrase, an idiom and an expression? I am looking for the context where one is more appropriate than the rest. I've been using idiom and phrase more or less interchangeably. 
Answer: This question asks nearly the same thing. This is the difference between an idiom and a phrase: A phrase is "a small group of words standing together as a conceptual unit", while an idiom is "a group of words established by usage as having a meaning not deducible from those of the individual words". So, the difference is that an idiom as an established meaning not directly linked to the individual words. Any idiom is a phrase. As an example, "raining cats and dogs" is both an idiom and a phrase. "A herd of cats" is a phrase but not an idiom. Expression has about the same meaning as phrase, except it is usually used of a phrase which is in common use. So an idiom is a certain sort of expression, which in turn is a subset of phrase: idiom > expression > phrase.

Output: yes


Input: Consider Input: Question: A few days ago, a friend and I were discussing how every "rule" of English spelling or pronunciation has an exception, and every exception has an exception as well. Then I brought up the rule of a ph cluster equaling an f sound (as in phonetic, elephant, morph, etc.) as a pronunciation rule that didn't have any exceptions I could think of. Is this a true hard-and-fast rule or does it have some exceptions as well? I'm not counting abbreviations such as pH scale. 
Answer: The exceptions come in two categories: Greek words that were originally pronounced with an "f" diphtheria, diphthong, ophthalmology, phthisis but have come to be pronounced with a "p" by no process I understand. Compound words uphold, saphead, peephole that are just a word ending in "p" run up against a word beginning with an "h". Neither of those really feel like exceptions: mispronunciations that have become accepted and two words being treated as one. Then there is aphelion. Arguably, that's a compound word and a mistake. By analogy with apogee and apastron, it should be apohelion: "apo" ("from") + "helion" ("sun"). Several people brought up "Stephen", which is often pronounced like "Steven". Eh, I think we should play with Scrabble rules: no proper names. Finally, there is an example that will really blow your minds: phthalate. The ph- is silent.

Output: yes


Input: Consider Input: Question: I was told in a Latin class that the name Christopher has Greek roots that mean "one who carries Christ". I assume that the Latin connection here is fero, which is the verb to carry. With that in mind, does the name Jennifer have a similar derivation? If so what would she be carrying? 
Answer: No Jennifer is from From a Cornish form of the Welsh name Gwenhwyfar (see GUINEVERE). This name has only been common outside of Cornwall since the beginning of the 20th century, after it was featured in George Bernard Shaw's play 'The Doctor's Dilemma' (1906). GUINEVERE From the Norman French form of the Welsh name Gwenhwyfar, composed of the elements gwen meaning "fair, white" and hwyfar meaning "smooth". In Arthurian legend she was the beautiful wife of King Arthur who engaged in an adulterous affair with Sir Lancelot. Her betrayal of her husband with Mordred prompted the battle of Camlann, which led to the deaths of both Mordred and Arthur. The Cornish form of this name, Jennifer, has become popular in the English-speaking world.


Output: yes