Given the question: Information:  - Steve Lacy (July 23, 1934  June 4, 2004), born Steven Norman Lackritz in New York City, was a jazz saxophonist and composer recognized as one of the important players of soprano saxophone. Coming to prominence in the 1950s as a progressive dixieland musician, Lacy went on to a long and prolific career. He worked extensively in experimental jazz and to a lesser extent in free improvisation, but Lacy's music was typically melodic and tightly-structured. Lacy also became a highly distinctive composer, with compositions often built out of little more than a single questioning phrase, repeated several times.  - Ragtime  also spelled rag-time or rag time  is a musical genre that enjoyed its peak popularity between 1895 and 1918. Its cardinal trait is its syncopated, or "ragged", rhythm. The genre has its origins in African-American communities like St. Louis years before being published as popular sheet music for piano. Ernest Hogan (18651909) was a pioneer of ragtime music and was the first to compose ragtime into sheet music. The composition was called "LA Pas Ma LA" and it was released in 1895. Hogan has also been credited for coining the term "ragtime". The term is actually derived from his hometown "Shake Rag" in Bowling Green, Kentucky. Ben Harney, who is also a Kentucky native has often been credited for introducing the music to the mainstream public. His first ragtime composition "You've been a good old wagon but you done broke" helped popularize the musical genre. The composition was published in 1895 but released in 1896. Ragtime was also a modification of the march made popular by John Philip Sousa, with additional polyrhythms coming from African music. The ragtime composer Scott Joplin ("ca." 18681917) became famous through the publication of the "Maple Leaf Rag" (1899) and a string of ragtime hits such as "The Entertainer" (1902), although he was later forgotten by all but a small, dedicated community of ragtime aficionados until the major ragtime revival in the early 1970s. For at least 12 years after its publication, "Maple Leaf Rag" heavily influenced subsequent ragtime composers with its melody lines, harmonic progressions or metric patterns.  - Steve Potts ( born January 21 , 1943 in Columbus , Ohio ) is an American jazz saxophonist . Playing mainly alto sax and occasionally soprano , Potts is best known for his 30 - year partnership with fellow saxophonist Steve Lacy . A cousin of tenor saxophonist Buddy Tate , Potts studied architecture in Los Angeles and took lessons from saxophonist Charles Lloyd . Afterwards he went to New York where he was student of Eric Dolphy and performed with Roy Ayers , Richard Davis , Joe Henderson , Reggie Workman , and Chico Hamilton . 1970 he moved to Europe to live in Paris . He performed with Dexter Gordon , Johnny Griffin , Slide Hampton , Mal Waldron , Ben Webster , Hal Singer , Christian Escoudé , Boulou Ferré , and Oliver Johnson . Around 1973 he met Steve Lacy and played in his groups for 30 years . Potts produced also film scores .  - Blues is a genre and musical form originated by African Americans in the Deep South of the United States around the end of the 19th century. The genre developed from roots in African musical traditions, African-American work songs and European-American folk music. Blues incorporated spirituals, work songs, field hollers, shouts, chants, and rhymed simple narrative ballads. The blues form, ubiquitous in jazz, rhythm and blues and rock and roll, is characterized by the call-and-response pattern, the blues scale and specific chord progressions, of which the twelve-bar blues is the most common. Blue notes (or "worried notes"), usually thirds or fifths flattened in pitch, are also an essential part of the sound. Blues shuffles or walking bass reinforce the trance-like rhythm and form a repetitive effect known as the groove.  - The soprano saxophone is a higher-register variety of the saxophone, a woodwind instrument, invented in the 1840s. The soprano is the third smallest member of the saxophone family, which consists (from smallest to largest) of the soprillo, sopranino, soprano, alto, tenor, baritone, bass, contrabass saxophone and tubax.  - Jazz is a music genre that originated amongst African Americans in New Orleans, United States, in the late 19th and early 20th centuries. Since the 1920s jazz age, jazz has become recognized as a major form of musical expression. It emerged in the form of independent traditional and popular musical styles, all linked by the common bonds of African American and European American musical parentage with a performance orientation. Jazz is characterized by swing and blue notes, call and response vocals, polyrhythms and improvisation. Jazz has roots in West African cultural and musical expression, and in African-American music traditions including blues and ragtime, as well as European military band music. Although the foundation of jazz is deeply rooted within the Black experience of the United States, different cultures have contributed their own experience and styles to the art form as well. Intellectuals around the world have hailed jazz as "one of America's original art forms".    Given the information, choose the subject and object entities that have the relation of 'instrument'.
The answer is:
steve potts  , saxophone