Positional / syntactic head. Attends by where a token is or how it relates grammatically — a fixed offset, subject→verb, modifier→noun — rather than by content. It is the broadest and least crisply defined family; many early-layer heads are largely positional. Shown on real BERT head 1, whose attention-offset histogram peaks at a measurable dominant offset. Green tier: real extracted attention; the offset is measured, not assigned.