Requirements
===========================================
	python2.7
	beautifulsoup4 
		To install beautifulsoup4 refer to  https://pypi.python.org/pypi/beautifulsoup4 or 
		if you have pip installed then use 'pip install beautifulsoup4'
		
		
How to run the script
===========================================
 Print help
	python2.7 collect_tweets.py -h
	
	Usage: collect_tweets.py [options] 

	Options:
	  -h, --help            show this help message and exit
	  -i INPUT_FILE, --input=INPUT_FILE
	                        specify input filename
	  -o OUTPUT_FILE, --output=OUTPUT_FILE
	                        specify output filename
 Run script	
	python2.7 collect_tweets.py -i <tsv input filename> -o <output filename>
	
	This will read user id and tweet id from input file and create a output file with tweet id, user id and tweet.However, if the tweet does not exist, then it will print "Not Found"
	
	
	
	
