If there's a standard output, there must be a standard input, right?
"Standard Input", usually called "standard in" or "stdin", is the default place where programs read their input. It's just a stream of data that programs can read from as they run.
All major programming languages provide a simple way to read from stdin. In Python, it's the input function:
# execution stops until the user types
# something (in this case "Lane") and presses enter
name = input("What is your name? ")
print("Hello,", name)
# Hello, Lane!
Run the worldbanc/private/bin/worldbanc.sh program again. Notice that it makes use of stdin to read your name and email.
Take a closer look at the code in the worldbanc.sh file. What command does it use to read from stdin?
Copy the command's name into the input field and submit your answer.