Adding example for running Keep it Simple model.

run_keep_it_simple.py

@@ -0,0 +1,35 @@
+import utils_misc, argparse, os, utils_edits
+
+utils_misc.select_freer_gpu()
+from model_generator import Generator
+# from model_access_simplifier import AccessSimplifier
+
+MODELS_FOLDER = os.environ["MODELS_FOLDER"]
+
+parser = argparse.ArgumentParser()
+parser.add_argument("--model_card", type=str, default="gpt2-medium", help="Either `gpt2` or `gpt2-medium`")
+parser.add_argument("--model_file", type=str, required=True, help="Use for example `gpt2_med_keep_it_simple.bin` provided in the codebase.")
+
+args = parser.parse_args()
+
+model = Generator(args.model_card, max_output_length=90, device='cuda')
+
+if len(args.model_file) > 0:
+    model.reload(args.model_file)
+model.eval()
+
+paragraph = """NASA's Curiosity rover just celebrated a major milestone — 3,000 days on the surface of Mars.
+               To mark the occasion, the space agency has released a stunning new panorama of the red planet, captured by the rover."""
+
+model_output = model.generate([paragraph], num_runs=8, sample=True)[0]
+
+print("ORIGINAL TEXT:")
+print(paragraph)
+
+print(utils_edits.show_diff_word("Legend: Deletions are in red. Additions are in.", "Legend: Deletions are in. Additions are in green."))
+
+print(model_output)
+
+for candidate in model_output:
+    print("----")
+    print(utils_edits.show_diff_word(paragraph, candidate["output_text"]))