question: What progression coincided with the the early Greek states that makes it difficult to give credit for the language and differences ?
answer: Paleo-Balkan sprachbund that makes it difficult to delineate exact boundaries between individual languages .
turker_answer: Paleo-Balkan sprachbund that makes it difficult to delineate exact boundaries between individual languages coincided with the early Greek states .
rule-based: Paleo-Balkan sprachbund that makes it difficult to delineate exact boundaries between individual languages coincided with the the early Greek states that makes it difficult to give credit for the language and differences .