def from_unknown_wkt(string, strict=False):
<EOL>return _from_wkt(string, None, strict)<EOL>
Given an unknown wkt string, detect if uses ogc or esri flavor, and parse the crs accordingly.

Arguments:

- *string*: The unknown WKT representation as a string.
- *strict* (optional): When True, the parser is strict about names having to match
    exactly with upper and lowercases. Default is not strict (False).

Returns:
- A CS instance of the indicated type.