sentence2_structure: 2050<>is<>the predicted year that as many as half of all remaining species could go extinct$$$as many as half of all remaining species<>could go<>extinct
sentence1: Given that rates of anthropogenically caused extinctions are 1000 to 100,000 times the natural background rate, and that by 2050 a predicted 50% of all species of life will be extinct, there is a pressing urgency to understand the role of biodiversity in ecosystem function everywhere.
sentence2: 2050 is the predicted year that as many as half of all remaining species could go extinct.
question: What is the predicted year that as many as half of all remaining species could go extinct?