Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| 17th c. | American | British | Australian | Examples |
| --- | --- | --- | --- | --- |
| ɐ | ə | ə | ə | amœba, anemone, ascesis |
| e | i, ɪ, ə | i, ɪ, ə | i, ɪ, ə | Elysium, emeritus, epitome, erotica |
| e | i, ɪ, ə | i, ɪ, ə | i, ɪ, ə | ænigma |
| e | i, ɪ, ə | i, ɪ, ə | i, ɪ, ə | œsophagus |
| ɛi | ai | aɪ | ɑe | idea |
| ɛi | ai | aɪ | ɑe | hyperbola, hypothesis |
| o | ɞu, ɞ, ə | əʊ, ə | əʉ, ə | Olympus |
Question:
What is 17th c., when American is "ə"?
Answer:
ɐ