sentences:  Another controversy involved Pablo Picasso's painting "Boy Leading a Horse" (1905–06), donated to MoMA by William S. Paley in 1964.The status of the work as being sold under duress by its German Jewish owners in the 1930s was in dispute.The descendants of the original owners sued MoMA and the Solomon R. Guggenheim Museum, which has another Picasso painting, "Le Moulin de la Galette" (1900), once owned by the same family, for return of the works.