Fixed evaluate.py

data/eval/lcquad-test-append-1-base-0.txt

data/eval/lcquad-test-append-1-base-1.txt

data/eval/lcquad-test-append-1-base-10.txt

data/eval/lcquad-test-append-1-base-2.txt

data/eval/lcquad-test-append-1-base-3.txt

data/eval/lcquad-test-append-1-base-4.txt

data/eval/lcquad-test-append-1-base-5.txt

data/eval/lcquad-test-append-1-base-6.txt

data/eval/lcquad-test-append-1-base-7.txt

data/eval/lcquad-test-append-1-base-8.txt

data/eval/lcquad-test-append-1-base-9.txt

data/pred_responses/lcquad-test-append-1-base-0.json

data/pred_responses/lcquad-test-append-1-base-1.json

data/pred_responses/lcquad-test-append-1-base-10.json

data/pred_responses/lcquad-test-append-1-base-2.json

data/pred_responses/lcquad-test-append-1-base-3.json

data/pred_responses/lcquad-test-append-1-base-4.json

data/pred_responses/lcquad-test-append-1-base-5.json

data/pred_responses/lcquad-test-append-1-base-6.json

data/pred_responses/lcquad-test-append-1-base-7.json