element-expression

    Specifies one or more elements whose reservations are to be
    canceled. An element expression can be an element name, a group
    name, a wildcard expression, or a list of these separated by
    commas.

 remark

    Specifies a character string to be logged in the history file
    with this command, usually used to explain why the command was
    entered. The remark is enclosed in quotation marks. If no remark
    was entered, a null remark ("") is logged.