alphabet

Deductions

• type of writing system is for example alphabet ⇐ (alphabet is a type of writing system), (is a is inverse of is for example)
• alphabet is for example Russian alphabet ⇐ (Russian alphabet is a alphabet), (is a is inverse of is for example)
• Russian alphabet is a alphabet ⇐ (Cyrillic-script alphabet is subclass of alphabet), (Russian alphabet is a Cyrillic-script alphabet)