question: At the time when BeiDou-2 system began offering services , what was the positioning data the system was able to provide ?
answer: between longitude 55 ° E to 180 ° E and from latitude 55 ° S to 55 ° N
turker_answer: At the time when BeiDou-2 system began offering services , the positioning data the system was able to provide was between longitude 55 ° E to 180 ° E and from latitude 55 ° S to 55 ° N.
rule-based: At the time when BeiDou-2 system began offering services , the positioning data the system was able to provide was between longitude 55 ° E to 180 ° E and from latitude 55 ° S to 55 ° N .