Revert "add Question: Answer to niah"

This reverts commit f70ec454.

lm_eval/tasks/ruler/niah_single_1.yaml

@@ -8,7 +8,7 @@ test_split: test
 download_dataset: !function niah_utils.niah_single_1
 doc_to_text: "{{input}}"
 doc_to_target: "{{outputs[0]}}"
-gen_prefix: "Answer: {{gen_prefix}}"
+gen_prefix: "{{gen_prefix}}"
 target_delimiter: " "
 process_results: !function common_utils.process_results
 metric_list:

lm_eval/tasks/ruler/niah_utils.py

@@ -7,7 +7,7 @@ from lm_eval.tasks.ruler.common_utils import DEFAULT_SEQ_LENGTHS, get_tokenizer
 from lm_eval.tasks.ruler.prepare_niah import generate_samples, get_haystack
 
 
-TEMPLATE = """Some special magic {type_needle_v} are hidden within the following text. Make sure to memorize it. I will quiz you about the {type_needle_v} afterwards.\n{context}\nQuestion: What are all the special magic {type_needle_v} for {query} mentioned in the provided text?"""
+TEMPLATE = """Some special magic {type_needle_v} are hidden within the following text. Make sure to memorize it. I will quiz you about the {type_needle_v} afterwards.\n{context}\nWhat are all the special magic {type_needle_v} for {query} mentioned in the provided text?"""
 
 
 def download_dataset(df: Generator) -> dict[str, datasets.Dataset]: