public class FirstJobMapper extends Mapper<LongWritable, Text, Text, Text> {

    public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {

        String record = value.toString();
        String[] parts = record.split(",");

        if (!parts[0].equals("RIDE_ID") && !parts[5].isEmpty()) {
            Text carCategory = new Text(parts[12]);
            Text distance = new Text(parts[5]);

            context.write(carCategory, distance);
        }
    }
}