How to Publish WP original Source metabox value on front-end webpage

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get_post_meta is returning an array. Apparently, the plugin is saving _original_source as an array.

I don’t know what that array looks like but instead of echo do print_r($original_source); and you get something that looks like:

Array
(
    [a] => apple
    [b] => banana
)

You can then do something like echo $original_source['a'] to print “apple”.