In this task, a passage will be given and the goal is to identify an event from the passage. An event is defined as a single word representing something that happened, is happening, or may happen. An event can be factual or hypothetical, positive or negative, certain or uncertain. While most events are based on verbs, an event can also be based on a noun (ex. storm, snow, rainfall) or a copula verb (is, was, been, etc.). The event must not be a pronoun or an adjective. For noun events with multiple words, use the last word in the phrase as event.

Let me give you an example: Passage: I submitted the hit. The hit was approved, and then I was paid.
The answer to this example can be: approved
Here is why: There are three events in this passage (i) submission event ("submitted") (ii) the approval event ("approved"), and (iii) the payment event ("paid"). You can use any one of them as an output.

OK. solve this:
Passage: But unlike in Britain, the sums involved are much larger, the accusations go right to the top of the party and the inquiry could run in tandem with the election campaign as any decision to suspend it is for the judiciary alone. 
Answer:
involved