Get data of trial events and their participants (DISSINET-specific)

How to match the person physically at trial (in a deposition, deponent)?

In DISSINET data, there are several concepts with different degree of generalization, which point to the person at trial. Generally, use this cascade of props under a trial event, preferring the first proptype match:

1. bed73d79-d3e7-4036-b357-42ec0da37c43 (person at trial hearing - i edited the label today, but anyway the UUID is the holder of identity and should be used in all cases, not label)
2. 4e4b5f63-8eac-41ec-96d4-45cbd19ea8f6 (deponent)
3. 06a4e252-d4fb-4956-9a9a-2614efb70351 (witness)
4. 4e2bffec-ead1-499e-8bd2-81ba45602c9e (testis)
5. 9e17df82-83fc-440d-8353-0a9c31a3766c (participant in a trial)
6. c5f3108d-d6ba-4ad7-afcc-2776ec9407ce (defendant)
7. 36082ea7-61aa-43b1-a6f3-9f07be17f59a (reus)

That is, if any "person at trial hearing" (bed73d79-d3e7-4036-b357-42ec0da37c43) is matched, don't continue and match this Person. Do not consider persons from different levels of the cascade, but only the first which is matched as proptype of a trial event, starting from no. 1 and continuing further. Because the point is not to match both deponent and defendant (the two can be different, e.g. if a witness gives testimony about another defendant in the trial of that defendant).