2015 has been a positive year thus far for investors in potash exploration company Sirius Minerals (LSE: SXX), support services contractor Balfour Beatty (LSE: BBY) and furniture seller DFS (LSE: DFS).
Refer to the input text as context and select the correct relationship between 'DFS' and 'furniture' from the available options.
Options: product/material produced, director/manager, owned by, position held