Update README.md

README.md

@@ -33,7 +33,7 @@ Then you can pull the dataset from Hugging Face:
 from datasets import load_dataset
 
 dataset = load_dataset("birdsql/bird_sql_dev_20251106")
-print(dataset[0])
+print(dataset["dev_20251106"][0])
 ```
 
 ### 🔄 For Existing Users
@@ -43,7 +43,7 @@ If you have already downloaded the BIRD databases, you can pull the latest data
 from datasets import load_dataset
 
 dataset = load_dataset("birdsql/bird_sql_dev_20251106")
-print(dataset[0])
+print(dataset["dev_20251106"][0])
 ```
 
 ## 🧱 Dataset Fields
@@ -64,10 +64,10 @@ Each entry in **BIRD-SQL Dev** is a JSON object with the following structure:
 {
   "question_id": 0,
   "db_id": "california_schools",
-  "question": "What is the highest eligible free rate for K-12 students in the schools in Alameda County?",
-  "evidence": "Eligible free rate for K-12 = `Free Meal Count (K-12)` / `Enrollment (K-12)`",
-  "SQL": "SELECT `Free Meal Count (K-12)` / `Enrollment (K-12)` FROM frpm WHERE `County Name` = 'Alameda' ORDER BY (CAST(`Free Meal Count (K-12)` AS REAL) / `Enrollment (K-12)`) DESC LIMIT 1",
-  "difficulty": "simple"
+  "question": "For the school with the highest free meal rate in Alameda County, what are its characteristics including whether it's a charter school, what grades it serves, its SAT performance level, and how much its free meal rate deviates from the county average?",
+  "evidence": "Free meal rate = Free Meal Count (K-12) / Enrollment (K-12). SAT performance levels are categorized as: Below Average (total score < 1200), Average (1200-1500), Above Average (> 1500), or No SAT Data if unavailable.",
+  "SQL": "WITH CountyStats AS (\n    SELECT \n        f.`County Name`,\n        f.`School Name`,\n        f.`Free Meal Count (K-12)`,\n        f.`Enrollment (K-12)`,\n        CAST(f.`Free Meal Count (K-12)` AS REAL) / f.`Enrollment (K-12)` AS FreeRate,\n        s.sname,\n        s.AvgScrRead,\n        s.AvgScrMath,\n        s.AvgScrWrite,\n        (s.AvgScrRead + s.AvgScrMath + s.AvgScrWrite) AS TotalSATScore,\n        sc.Charter,\n        sc.GSserved,\n        RANK() OVER (PARTITION BY f.`County Name` ORDER BY CAST(f.`Free Meal Count (K-12)` AS REAL) / f.`Enrollment (K-12)` DESC) AS CountyRank\n    FROM frpm f\n    LEFT JOIN schools sc ON f.CDSCode = sc.CDSCode\n    LEFT JOIN satscores s ON f.CDSCode = s.cds\n    WHERE f.`Enrollment (K-12)` > 0 \n    AND f.`County Name` = 'Alameda'\n)\nSELECT \n    cs.`County Name` AS County,\n    cs.`School Name`,\n    cs.FreeRate AS HighestFreeRate,\n    cs.`Free Meal Count (K-12)` AS FreeMealCount,\n    cs.`Enrollment (K-12)` AS TotalEnrollment,\n    CASE \n        WHEN cs.Charter = 1 THEN 'Yes'\n        WHEN cs.Charter = 0 THEN 'No'\n        ELSE 'Unknown'\n    END AS IsCharterSchool,\n    cs.GSserved AS GradesServed,\n    CASE\n        WHEN cs.TotalSATScore IS NULL THEN 'No SAT Data'\n        WHEN cs.TotalSATScore < 1200 THEN 'Below Average'\n        WHEN cs.TotalSATScore BETWEEN 1200 AND 1500 THEN 'Average'\n        ELSE 'Above Average'\n    END AS SATPerformance,\n    (SELECT AVG(CAST(f2.`Free Meal Count (K-12)` AS REAL) / f2.`Enrollment (K-12)`)\n     FROM frpm f2\n     WHERE f2.`County Name` = 'Alameda' AND f2.`Enrollment (K-12)` > 0) AS CountyAverageFreeRate,\n    cs.FreeRate - (SELECT AVG(CAST(f2.`Free Meal Count (K-12)` AS REAL) / f2.`Enrollment (K-12)`)\n                  FROM frpm f2\n                  WHERE f2.`County Name` = 'Alameda' AND f2.`Enrollment (K-12)` > 0) AS DeviationFromCountyAverage\nFROM CountyStats cs\nWHERE cs.CountyRank = 1\nORDER BY cs.FreeRate DESC\nLIMIT 1;",
+  "difficulty": "challenging"
 }
 ```