Мафия 89. Nemesis

Yashchur, Ment – is active, and, in my opinion, he doesn't seem very suspicious yet.

But on Neiru, Drake is firmly established as a lead.

Maybe someone can remind me what the solution is? And can it be linked to the second clue?

5 4 3_1 5 4 3_1, what is this dragon's serial number?

The code is repeated twice in the description because first, we are pointed to it as a clue, and then – a literary description in the plot from the perspective of an observer. At least, that's how we decided.