Lighthouse tower e hammer: o que têm em comum

1. Passo 1. Lighthouse tower — faz parte de — Lighthouse. A tall base for the light source.
2. Passo 2. Lighthouse — é feito de — Stone. The Lighthouse of Alexandria was a stone tower.
3. Passo 3. Stone — é material para — Hammer. The first hammer was a hammerstone, later mounted on a handle.

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