Printing ink e gas lamp: o que têm em comum

1. Passo 1. Printing ink — faz parte de — Newspaper. Printing ink.
2. Passo 2. Newspaper — utiliza — Paper. Newsprint.
3. Passo 3. Paper — é material para — Hot air balloon. It was lined with paper on the inside.
4. Passo 4. Hot air balloon — tem como parte — Gas burner. It heats the air in the envelope with a propane flame.
5. Passo 5. Gas burner — faz parte de — Gas lamp. A coal-gas burner.

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