s is structure name
Structure names must be enclosed in angle brackets <> and can only use letters a-z, A-Z, numbers 0-9 and underscore (_).
direct_speech and type are attribute names
Attribute names can only use letters a-z, A-Z, numbers 0-9 and underscore (_). Attributes can be multivalue or even hierarchical.
yes and question are values
Values must be enclosed in plaintext double quotes, rounded typographic quotes are not allowed. Values can contain any characters including accented characters. If a double quote is part of a value, it must be escaped with a backslash