Given two noun phrases (arguments) and relationship between them, form a sentence that expresses theses arguments with the given relationship.

Relationship: 'be centre of', Argument/Subject 1: 'maroochydore', Argument/Subject 2: 'sunshine coast'
Maroochydore is also at the very centre of the Sunshine Coast , with Caloundra to the south and Noosa to the north .

Relationship: 'be city in', Argument/Subject 1: 'siena', Argument/Subject 2: 'tuscany'
Siena is one of the leading art cities in Tuscany .

Relationship: 'be city in', Argument/Subject 1: 'south el monte', Argument/Subject 2: 'lo angele county'

Polycoat Products was established in 1979 in South El Monte , a city located in Los Angeles County .