We can use another form of variable expansion to select a specific substring, based on a specific character offset and length. Try typing in the following lines under bash.

Remember that UTF-8 encodes data an a variable-length format; the Unicode character at position 450 simply needed two bytes to be encoded in UTF-8.

The description column is a variable-length character string, so it expects a string (which you indicate by enclosing the character data within single quotes).