## Changes to contrib APIs

*   Adds tf.contrib.nn.rank_sampled_softmax_loss, a sampled-softmax variant that
    can improve rank loss.
*   `tf.contrib.metrics`.{streaming_covariance,streaming_pearson_correlation}
    modified to return nan when they have seen less or equal to 1 unit of
    weight.
*   Adds time series models to contrib. See contrib/timeseries/README.md for
    details.

1F9CB         ; valid                  ;      ; NV8    # 13.0 BUBBLE TEA
1F9CC         ; valid                  ;      ; NV8    # 14.0 TROLL
1F9CD..1F9CF  ; valid                  ;      ; NV8    # 12.0 STANDING PERSON..DEAF PERSON
1F9D0..1F9E6  ; valid                  ;      ; NV8    # 10.0 FACE WITH MONOCLE..SOCKS
1F9E7..1F9FF  ; valid                  ;      ; NV8    # 11.0 RED GIFT ENVELOPE..NAZAR AMULET

- The PR adds functionality to generate events when a PV or PVC processing encounters certain failures. The events help users to know the reason for the failure so they can take necessary recovery actions. ([#89845](https://github.com/kubernetes/kubernetes/pull/89845), [@yuga711](https://github.com/yuga711)) [SIG Apps]