scala> val wikiData = sqlContext.parquetFile("data/wiki_parquet")
warning: there were 1 deprecation warning(s); re-run with -deprecation for details
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
wikiData: org.apache.spark.sql.DataFrame = [id: int, title: string, modified: bigint, text: string, username: string]