list(tau = structure(.Data = c(0.5,0,0,0.5), .Dim = c(2,2)),
		Y = structure(
				.Data = c(NA,NA,
				               NA,NA,
				               NA,NA,
				              NA, NA,
				               NA, 2,
				               NA, 2,
				               NA, 2,
				               NA, 2,
				               3, NA,
				               3, NA,
				               3, NA,
				               3, NA),
				    .Dim = c(12, 2)))