is it possible to use multiple sub_filter in one location?

[Florin Andrei]

Trying to do this:

location /whatever/ {
     proxy_buffering off;
     proxy_pass http://11.22.33.44:5555;
     sub_filter '"df":"https://df-foo"' '"df":"https://df-bar"';
     sub_filter '"pr":"https://pr-foo"' '"pr":"https://pr-bar"';
     sub_filter_once off;
     sub_filter_types *;
}

But I'm getting this:

nginx: [emerg] "sub_filter" directive is duplicate in ...

How do I replace multiple things in one location?

Thanks.

-- 
Florin Andrei
http://florin.myip.org/