c1 Nullable(String) c2 Nullable(String) c3 Nullable(String) c1 Nullable(String) c2 Nullable(String) c3 Nullable(String) c1 UInt64 c2 UInt64 c3 UInt64 c1 Nullable(String) c2 Nullable(String) c3 Nullable(String) c1 UInt64 c2 UInt64 c3 UInt64 c1 Nullable(String) c2 Nullable(String) c3 Nullable(String) c1 UInt64 c2 UInt64 c3 UInt64 c1 UInt64 c2 UInt64 c3 UInt64