A question about a grammatical structure in English language Please read the text below carefully and tell me what is the type of grammatical structure in this phrase: "" to studying "". Do we have such structure in English or not? Text: Several analytic tendencies distinguish social network analysis: There is no assumption that groups are the building blocks of society, the approach is open ""to studying"" less-bounded social systems, from nonlocal communities to links among websites. Rather than treating individuals (persons, organizations, states) as discrete units of analysis, it focuses on how the structure of ties affects individuals and their relationships. In contrast to analyses that assume that socialization into norms determines behavior, network analysis looks to see the extent to which the structure and composition of ties affect norms.