dataframe-2.3.0.0: tests/data/unstable_csv/either_read_mixed.csv
id,score,name 1,10,alice 2,20,bob 3,30,carol 4,40,dave 5,50,eve 6,abc,frank 7,,grace 8,80,N/A
id,score,name 1,10,alice 2,20,bob 3,30,carol 4,40,dave 5,50,eve 6,abc,frank 7,,grace 8,80,N/A