Fortran and rock drill: what they have in common

1. Step 1. Fortran — is a kind of — Programming language. A programming language.
2. Step 2. Programming language — evolved from — Ada Lovelace’s program. Lovelace is regarded as the first programmer.
3. Step 3. Ada Lovelace’s program — uses — Babbage’s Analytical Engine. The program was written for the Analytical Engine.
4. Step 4. Babbage’s Analytical Engine — is made of — Cast iron. The frame is cast iron.
5. Step 5. Cast iron — is material for — Rock drill. The casing is cast iron.

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