Thanks a lot. So sorry, I've another question. It is said in general grammatical rules, it is not right to start a sentence with a conjunction. But in these links, they say another thing.
Follow the very sound advice in the second link: Whilst it is acceptable to use "And" or "But" to start a sentence, this practice should be limited and only used for effect and impact. If you find yourself using them too often, you should consider changing the style of your writing. (This from