Conferences: remove non-numerical values from 411__n about inspire HOT 4 OPEN

https://inspirehep.net/search?ln=en&cc=Conferences&ln=en&cc=Conferences&p=411__n%3A%2F%5B%5E0-9%5D%2F&action_search=Search&sf=conferencestartdate&so=d&rm=&sc=0&of=t&ot=411__n&rg=1000

Some of them contain the st,nd,rd,th suffixes, most of them contain the dummy value x. some of them contain garbage.

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fixed st,nd,rd,th. 169 records left with 411__n:x. The x signifies that this conference is part of a series which hasn't been properly treated yet. Maybe some x's can be automatically replaced by numbers from the title, e.g. if a number has th as suffix:
447th Wilhelm and Else Heraeus Seminar: Charmed Exotics

41 records have the correct number in a separate field, e.g.
000977640 411__ $$aMG$$nx
000977640 411__ $$n11
https://inspirehep.net/search?ot=411&cc=Conferences&ln=en&cc=Conferences&p=411__n%3Ax+411__n%3A%2F%5Cd%2F&action_search=Search&sf=conferencestartdate&so=d&rm=&rg=25&sc=0&of=hb
Sam, could you automatically replace the x by the number?

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@kaplun , can you take this ticket please?

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There are 128 records with only an x. Most of them have a number in the title ending on st,nd,rd,th. @kaplun , could you add these automatically as well? The rest we'll check by hand.

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