Pig Latin: Filter number <5 and >= 5 in chararray (text and numbers) - apache-pig

Question

How can I filter or group those with less than 5 years and those with more than 5 years. I am very new to Pig Latin. The ID, e.g. BUS2003 should be left as is.
Input Data
ID,Experience
BUS2003,More than 17 years teaching experience
BUS1303,2 years teaching experience
BUS4543,13 plus years of teaching experience; 4 plus years of corporate experience
BUS2103,4 year + 6 years in business
BUS2913,8 yrs teaching experience
I know how to load the data in to PigStorage or CSVloader, however, I am having a hard time solving the Experience due to words and numbers being together.
Desired result:
**Less than five years**
BUS1303,2 years teaching experience
BUS2103,4 year + 6 years in business
**Equal or greater than five years**
BUS2003,More than 17 years teaching experience
BUS4543,13 plus years of teaching experience; 4 plus years of corporate experience
BUS2913,8 yrs teaching experience
Thanks in advance.

Answer 1

You'll have to extract the number and then split.This should get you what you are looking for
A = LOAD 'input.txt' USING PigStorage(',') AS (a1:chararray,a2:chararray);
B = FOREACH A GENERATE a1,a2,REGEX_EXTRACT(a2,'(\\d*)',1) as exp:int;
C = SPLIT B INTO C1 IF B.exp < 5, C2 IF B.exp >= 5;
DUMP C1;
DUMP C2;