I want to know the answer to the following question:
What is presumed to be written upon the Cascajal Block?
All the background I'm provided with is that "The Olmec hieroglyphs tablet has been indirectly dated from ceramic shards found in the same context to approximately 900 BCE, around the time that Olmec occupation of San Lorenzo Tenochtitlán began to wane.". Is that enough to answer the question?