JDIC to the rescue! First given definition of "soshiki" (そしき) [組織]

組織 【そしき】 (n,vs) (1) organization; (2) structure; construction; (3) tissue; (4) system;

(1) 役員評議会が組織されて新提案を協議した。 An executive council was formed to discuss the new proposal.

Looks like そしき is a nominative word which can be used as part of a compound verb, as in 組織する [to form an organization]. (soshiki-sarete in the example given is in the tense "was-formed / was-organized").

I love variety in both human and computer languages.

Digressions aside, I like the name. And the site itself looks fantastic. Good luck!