[Answer] Which is the only tennis Grand Slam tournament that is played on grass courts currently?

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[Answer] 4. What colorful lawn grass gives Kentucky its nickname?

Step 1 : Introduction to the question "4. What colorful lawn grass gives Kentucky its nickname?"

...1. Bluebonnet 2. Greengrass 3. Bluegrass 4. Yellow weed Kentucky is known as the Bluegrass State. Poa pratensis, or bluegrass, gets its name from its flower heads, which are blue when allowed to grow to their natural height.