The parcel, containing sew-on patches of the club's crest, is believed to have fallen behind machinery in a sorting centre at Australia Post -- the state-owned mail service -- only to be discovered recently when the company moved to another facility, reported Xinhua citing News Corp. Former committee member of the tennis club Irene Garrett, who the package was addressed to, said she "had a good laugh" when the item finally arrived.
Refer to the input text as context and select the correct relationship between 'Australia Post' and 'mail' from the available options.
Options: industry, founded by, employer, operator