They think that robots will even be able to talk like humans in 25 to 50 years
这是一个含有宾语从句的主从复合句。
主句:主语They + 谓语 think + 宾语(从句)that... years
宾语从句:引导词that + 主语robots + 谓语 will be able to talk + (程度)状语 even + (方式)状语like humans + (时间)状语in 25 to 50 years
句子是主谓宾结构,they主语,think谓语,robots...years宾语。