BSD-2-clause with header

Hi everyone,

I'm packaging a software which includes the following license statement:

```

Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,

the U.S. Government retains certain rights in this software.

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are

met:

Redistributions of source code must retain the above copyright notice,

this list of conditions and the following disclaimer. Redistributions

in binary form must reproduce the above copyright notice, this list of

conditions and the following disclaimer in the documentation and/or

other materials provided with the distribution. Neither the name of

the Corporation nor the names of the contributors may be used to

endorse or promote products derived from this software without

specific prior written permission.

THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY EXPRESS

OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE CONTRIBUTORS BE

LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

THE POSSIBILITY OF SUCH DAMAGE.

```

This is exactly the 2-clause BSD, plus the header

```

Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains certain rights in this software.

```

Does the header count as copyright statement? Can we call this license BSD-2-clause?

Cheers,

Nico