 
 <prompt> text: ```Phonology na one branch of linguistics wey dey concerned with the systematic arrangement of sounds for languages. E don dey focus mainly on the study of the systems of phonemes for particular languages (and e dey also dey called phonemics or phonematics before), but e fit also cover any linguistic analysis for levels wey dey below the word (like syllable, onset and rime, articulatory gestures, articulatory features, mora, etc.) or for all levels of language wey sound dey structured to carry linguistic meaning. Phonology also dey include the study of equivalent organizational systems for sign languages.

The word phonology (like the phonology of English) fit also refer to the phonological system (sound system) of one particular language. Dis na one of the fundamental systems wey dem dey consider say one language get, like its syntax and its vocabulary.

Phonology dey different from phonetics. While phonetics dey concerned with the physical production, acoustic transmission and perception of the sounds of speech, phonology dey describe the way sounds dey work inside one particular language or across languages to encode meaning. For many linguists, phonetics dey under descriptive linguistics, and phonology dey under theoretical linguistics, even though establishing the phonological system of one language na application of theoretical principles to analysis of phonetic evidence. Note say this difference no dey always dey, especially before the development of the modern concept of the phoneme for the mid 20th century. Some subfields of modern phonology get crossover with phonetics for descriptive disciplines like psycholinguistics and speech perception, wey result in specific areas like articulatory phonology or laboratory phonology.

Now, provide a numbered list of answers to these questions:

1. When the concept of the phoneme first come out?
2. E dey common for phonology to focus on phonemes for certain languages?
3. Before, phonology get different name?
4. E get more than one name?
5. Wetin be one of those names?
6. And the other name?
7. E dey common for phonology to dey different from something?
8. From wetin?
9. How many concepts phonetics dey concern?
10. And one of those concepts na wetin?
11. And another one?
12. And the last one?
13. According to people wey dey work for the field, phonetics belong to which brand of linguistics?
14. And phonology belong to one specific one?
15. Which one?
16. Wetin dem dey call person wey dey work for this field?
17. Sign languages fit fall under this field for linguistics?
18. Under which branch specifically?
19. Sound system fit be part of the fundamental system of one language?

Numbered answers:``` <response>: ```1. di mid 20th century.
2. yes
3. yes
4. yes
5. phonematics
6. phonemics
7. yes
8. phonetics
9. Three
10. physical production of di sounds of speech
11. di acoustic transmission of dose sounds
12. Di perception of di sounds
13. descriptive linguistics
14. yes
15. theoretical linguistics
16. linguist
17. yes
18. Phonology
19. yes``` 