Const args
args: Arguments = yargs.usage("Usage: wordmap -c [source corpus path] [target corpus path] -s [source sentence] [target sentence]").help("help").alias("h", "help").alias("c", "corpus").describe("c", "Paths to the primary and secondary corpus text").array("c").alias("s", "sentence").describe("s", "The primary and secondary sentences to align").array("s").alias("o", "out").describe("o", "Output file path").default("o", "./alignment_predictions.json").alias("p", "predictions").describe("p", "The number of alignment predictions to generate").default("p", 1).strict().demandOption(["c", "s"]).argv