The page is password protected to limit access to course participants.
For practical reasons,
there are certain restrictions with respect to the length of queries and
the number of parse trees and complexity of AVM embeddings in the web
interface:
There's an upper limit to the length of input strings, and only
eight solutions of ambiguous sentences will be shown. The possible depth
of embedding in AVMs depends on your particular browser. Beyond that
browser-specific depth AVMs cannot be expanded.
In order to use the web interface, JavaScript must be enabled.