Summary

Nested subordinate clauses embed one clause inside another to encode logical hierarchy and information weight.
Verb-final rule applies at every level: each embedded clause independently moves its finite verb to final position.
Relative + temporal nesting: a relative clause may contain a temporal subordinate, delaying the predicate of the outer clause.
wer-clause with indirect question: the wer-clause acts as subject and itself embeds an indirect question in verb-final order.
Interrupted structure: a subordinate clause can be inserted between a subject and its predicate within a larger clause.
je...desto: je-clause (verb-final) + desto-clause (inversion: desto + adj/adv + verb + subject) + optional embedded clause.
Literary function: nesting encodes dependency relationships that a sequence of simple sentences cannot express.
Parsing test: strip the innermost clause — the outer clause must remain grammatically complete.