Index card and shaduf: what they have in common

1. Step 1. Index card — is made of — Paper. Paper.
2. Step 2. Paper — is material for — Paper coffee filter. Paper.
3. Step 3. Paper coffee filter — works like — Water filter. Filtering a liquid through a porous medium.
4. Step 4. Water filter — is part of — Drip irrigation. Water is filtered before the drippers, or the thin tubes clog.
5. Step 5. Drip irrigation — is a kind of — Irrigation. A kind of irrigation.
6. Step 6. Irrigation — uses — Shaduf. The shaduf fed water into the canals.

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